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configure.ac
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dnl ***************************************************************************
dnl $Id$
dnl
dnl Project: GDAL
dnl Purpose: Configure source file.
dnl Author: Frank Warmerdam, [email protected]
dnl
dnl ***************************************************************************
dnl Copyright (c) 2000, Frank Warmerdam
dnl
dnl Permission is hereby granted, free of charge, to any person obtaining a
dnl copy of this software and associated documentation files (the "Software"),
dnl to deal in the Software without restriction, including without limitation
dnl the rights to use, copy, modify, merge, publish, distribute, sublicense,
dnl and/or sell copies of the Software, and to permit persons to whom the
dnl Software is furnished to do so, subject to the following conditions:
dnl
dnl The above copyright notice and this permission notice shall be included
dnl in all copies or substantial portions of the Software.
dnl
dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
dnl OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
dnl FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
dnl THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
dnl LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
dnl FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
dnl DEALINGS IN THE SOFTWARE.
dnl ***************************************************************************
dnl Disable configure caching ... it causes lots of hassles.
define([AC_CACHE_LOAD], )
define([AC_CACHE_SAVE], )
dnl Process this file with autoconf to produce a configure script.
AC_INIT
AC_CONFIG_SRCDIR([GDALmake.opt.in])
AC_SUBST(PACKAGE, gdal)
AC_CONFIG_MACRO_DIR(m4)
AC_CONFIG_HEADERS([generated_headers/cpl_config.h:port/cpl_config.h.in])
AH_TOP([#ifndef CPL_CONFIG_H])
AH_TOP([#define CPL_CONFIG_H])
AH_BOTTOM([#include "cpl_config_extras.h"])
AH_BOTTOM([#endif])
AC_PREREQ([2.69])
dnl Compute the canonical host-system (the system we are building for)
dnl type variable $host
AC_CANONICAL_HOST
dnl Enable as much warnings as possible
AC_LANG_PUSH([C])
AX_COMPILER_VENDOR
AC_LANG_POP([C])
AX_CFLAGS_WARN_ALL(C_WFLAGS)
AC_LANG_PUSH([C++])
AX_COMPILER_VENDOR
AC_LANG_POP([C++])
AX_CXXFLAGS_WARN_ALL(CXX_WFLAGS)
dnl Remove -Wdeclaration-after-statement that is no longer appropriate in C99
C_WFLAGS=`echo "$C_WFLAGS " | sed "s/-Wdeclaration-after-statement //"`
dnl For ICC: it needs -we10006 instead of -Werror to turn unknown options to errors
dnl Some gcc/clang versions might succeed on this test, so also include -Werror in ERROR_ON_UNKNOWN_OPTIONS
AX_CHECK_COMPILE_FLAG([-Werror -we10006],[ERROR_ON_UNKNOWN_OPTIONS="-Werror -we10006"],[ERROR_ON_UNKNOWN_OPTIONS="-Werror"])
dnl A few ICC warnings to turn off
dnl warning #188: enumerated type mixed with another type (needed on libcsf)
dnl warning #1684: conversion from pointer to same-sized integral type (potential portability problem) (needed on frmts/mrf)
dnl warning #2259: non-pointer conversion from "size_t={unsigned long}" to "int" may lose significant bits
dnl warning #2304: non-explicit constructor with single argument may cause implicit type conversion
dnl warning #3280: declaration hides member
dnl remark #11074: Inlining inhibited by limit max-size
dnl remark #11076: To get full report use -qopt-report=4 -qopt-report-phase ipo
AX_CHECK_COMPILE_FLAG([-diag-disable 188,1684,2259,2304,3280,11074,11076],[C_WFLAGS="$C_WFLAGS -diag-disable 188,1684,2259,2304,3280,11074,11076" CXX_WFLAGS="$CXX_WFLAGS -diag-disable 188,1684,2259,2304,3280,11074,11076"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wextra],[C_WFLAGS="$C_WFLAGS -Wextra" CXX_WFLAGS="$CXX_WFLAGS -Wextra"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Winit-self],[C_WFLAGS="$C_WFLAGS -Winit-self" CXX_WFLAGS="$CXX_WFLAGS -Winit-self"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wunused-parameter], [C_WFLAGS="$C_WFLAGS -Wunused-parameter" CXX_WFLAGS="$CXX_WFLAGS -Wunused-parameter" NO_UNUSED_PARAMETER_FLAG="-Wno-unused-parameter"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wmissing-prototypes], [C_WFLAGS="$C_WFLAGS -Wmissing-prototypes"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wmissing-declarations], [C_WFLAGS="$C_WFLAGS -Wmissing-declarations"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wformat], [C_WFLAGS="$C_WFLAGS -Wformat" CXX_WFLAGS="$CXX_WFLAGS -Wformat"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wformat -Werror=format-security -Wno-format-nonliteral], [C_WFLAGS="$C_WFLAGS -Werror=format-security -Wno-format-nonliteral" CXX_WFLAGS="$CXX_WFLAGS -Werror=format-security -Wno-format-nonliteral"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wshorten-64-to-32], [C_WFLAGS="$C_WFLAGS -Wshorten-64-to-32" CXX_WFLAGS="$CXX_WFLAGS -Wshorten-64-to-32"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wlogical-op], [C_WFLAGS="$C_WFLAGS -Wlogical-op" CXX_WFLAGS="$CXX_WFLAGS -Wlogical-op" NO_LOGICAL_OP_FLAG="-Wno-logical-op"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wshadow], [C_WFLAGS="$C_WFLAGS -Wshadow" CXX_WFLAGS="$CXX_WFLAGS -Wshadow"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wmissing-include-dirs], [C_WFLAGS="$C_WFLAGS -Wmissing-include-dirs" CXX_WFLAGS="$CXX_WFLAGS -Wmissing-include-dirs"],,[$ERROR_ON_UNKNOWN_OPTIONS])
dnl Error out on things that will fail with MSVC
AX_CHECK_COMPILE_FLAG([-Werror=vla], [C_WFLAGS="$C_WFLAGS -Werror=vla" CXX_WFLAGS="$CXX_WFLAGS -Werror=vla"],,[$ERROR_ON_UNKNOWN_OPTIONS])
dnl -Wclobbered is not reliable on most gcc versions
dnl AX_CHECK_COMPILE_FLAG([-Wno-clobbered], [C_WFLAGS="$C_WFLAGS -Wno-clobbered" CXX_WFLAGS="$CXX_WFLAGS -Wno-clobbered"],,[$ERROR_ON_UNKNOWN_OPTIONS])
dnl Warn when macros __TIME__, __DATE__ or __TIMESTAMP__ are encountered as they might prevent bit-wise-identical reproducible compilations.
AX_CHECK_COMPILE_FLAG([-Wdate-time], [C_WFLAGS="$C_WFLAGS -Wdate-time" CXX_WFLAGS="$CXX_WFLAGS -Wdate-time"],,[$ERROR_ON_UNKNOWN_OPTIONS])
dnl GCC 6 warnings
AX_CHECK_COMPILE_FLAG([-Wnull-dereference], [C_WFLAGS="$C_WFLAGS -Wnull-dereference" CXX_WFLAGS="$CXX_WFLAGS -Wnull-dereference"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wduplicated-cond], [C_WFLAGS="$C_WFLAGS -Wduplicated-cond" CXX_WFLAGS="$CXX_WFLAGS -Wduplicated-cond"],,[$ERROR_ON_UNKNOWN_OPTIONS])
dnl GCC 7 warnings
dnl Do not enable yet. Causes warning in alg/gdalthinplate.cpp due to armadillo templates
dnl AX_CHECK_COMPILE_FLAG([-Wduplicated-branches], [C_WFLAGS="$C_WFLAGS -Wduplicated-branches" CXX_WFLAGS="$CXX_WFLAGS -Wduplicated-branches"],,[$ERROR_ON_UNKNOWN_OPTIONS])
dnl GCC 8 warnings
AC_LANG_PUSH([C++])
AX_CHECK_COMPILE_FLAG([-Wextra-semi], [CXX_WFLAGS="$CXX_WFLAGS -Wextra-semi"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AC_LANG_POP([C++])
dnl clang >= 3.9
AX_CHECK_COMPILE_FLAG([-Wcomma], [C_WFLAGS="$C_WFLAGS -Wcomma" CXX_WFLAGS="$CXX_WFLAGS -Wcomma"],,[$ERROR_ON_UNKNOWN_OPTIONS])
dnl clang and gcc 5
AX_CHECK_COMPILE_FLAG([-Wfloat-conversion], [C_WFLAGS="$C_WFLAGS -Wfloat-conversion" CXX_WFLAGS="$CXX_WFLAGS -Wfloat-conversion"],,[$ERROR_ON_UNKNOWN_OPTIONS])
dnl clang >= 3.2
AX_CHECK_COMPILE_FLAG([-Wdocumentation -Wno-documentation-deprecated-sync], [C_WFLAGS="$C_WFLAGS -Wdocumentation -Wno-documentation-deprecated-sync" CXX_WFLAGS="$CXX_WFLAGS -Wdocumentation -Wno-documentation-deprecated-sync"],,[$ERROR_ON_UNKNOWN_OPTIONS])
dnl C++ specific stuff
AC_LANG_PUSH([C++])
AX_CHECK_COMPILE_FLAG([-Wunused-private-field], [CXX_WFLAGS="$CXX_WFLAGS -Wunused-private-field"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wmissing-declarations], [CXX_WFLAGS="$CXX_WFLAGS -Wmissing-declarations"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wnon-virtual-dtor], [CXX_WFLAGS="$CXX_WFLAGS -Wnon-virtual-dtor" NO_NON_VIRTUAL_DTOR_FLAG="-Wno-non-virtual-dtor"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Wold-style-cast], [WARN_OLD_STYLE_CAST="-Wold-style-cast"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AX_CHECK_COMPILE_FLAG([-Weffc++], [WARN_EFFCPLUSPLUS="-Weffc++"],,[$ERROR_ON_UNKNOWN_OPTIONS])
dnl g++-4.8 complain a bit too much with -Weffc++
if test "$WARN_EFFCPLUSPLUS" != ""; then
SAVED_CXXFLAGS=$CXXFLAGS
CXXFLAGS="$CXXFLAGS $WARN_EFFCPLUSPLUS -Werror"
AC_MSG_CHECKING([if -Weffc++ should be enabled])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[
class Base {};
class A: public Base {};
]])],
[AC_MSG_RESULT([yes])],
[WARN_EFFCPLUSPLUS=""]
[AC_MSG_RESULT([no])])
CXXFLAGS=$SAVED_CXXFLAGS
fi
dnl Clang enables -Woverloaded-virtual if -Wall is defined, but not GCC
AX_CHECK_COMPILE_FLAG([-Woverloaded-virtual], [CXX_WFLAGS="$CXX_WFLAGS -Woverloaded-virtual"],,[$ERROR_ON_UNKNOWN_OPTIONS])
dnl Forbid use of 'or', 'and', ... alias operators
AX_CHECK_COMPILE_FLAG([-fno-operator-names], [CXX_WFLAGS="$CXX_WFLAGS -fno-operator-names"],,[$ERROR_ON_UNKNOWN_OPTIONS])
HAVE_GCC_WARNING_ZERO_AS_NULL_POINTER_CONSTANT=no
AX_CHECK_COMPILE_FLAG([-Wzero-as-null-pointer-constant], [CXX_WFLAGS="$CXX_WFLAGS -Wzero-as-null-pointer-constant" HAVE_GCC_WARNING_ZERO_AS_NULL_POINTER_CONSTANT=yes],,[$ERROR_ON_UNKNOWN_OPTIONS])
if test "$HAVE_GCC_WARNING_ZERO_AS_NULL_POINTER_CONSTANT" = "yes"; then
AC_DEFINE_UNQUOTED(HAVE_GCC_WARNING_ZERO_AS_NULL_POINTER_CONSTANT, 1,
[Define to 1 if the compiler supports -Wzero-as-null-pointer-constant])
fi
AC_LANG_POP([C++])
CXX14_SUPPORT=no
AC_ARG_WITH([cpp14],
AS_HELP_STRING([--with-cpp14],
[Enable C++14 compiler options]),,)
AC_MSG_CHECKING([if use C++14 compiler options])
if test "$with_cpp14" = "yes"; then
dnl Check C++ compiler compatibility with C++14
AC_MSG_CHECKING([C++ compiler compatibility with C++14])
AX_CXX_COMPILE_STDCXX([14],[noext],[optional])
if [test "$HAVE_CXX14" = "1"]; then
CXX14_SUPPORT=yes
fi
AC_MSG_RESULT([enabled])
else
AC_MSG_RESULT([disabled by user])
fi
AC_SUBST(CXX14_SUPPORT,$CXX14_SUPPORT)
if [test "$CXX14_SUPPORT" = "no"]; then
AX_CXX_COMPILE_STDCXX_11([noext],[mandatory])
fi
dnl Available in GCC 5.1
AC_LANG_PUSH([C++])
AX_CHECK_COMPILE_FLAG([-Wsuggest-override], [CXX_WFLAGS="$CXX_WFLAGS -Wsuggest-override"],,[$ERROR_ON_UNKNOWN_OPTIONS])
AC_LANG_POP([C++])
dnl Enable -Wimplicit-fallthrough only if C++11 is enabled since CPL_FALLTHROUGH is only active then
AC_LANG_PUSH([C++])
SAVED_CXXFLAGS=$CXXFLAGS
CXXFLAGS="$CXXFLAGS $ERROR_ON_UNKNOWN_OPTIONS -Wimplicit-fallthrough"
AC_MSG_CHECKING([if -Wimplicit-fallthrough can be enabled])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[#if !(__cplusplus >= 201103L && ( (defined(__clang__) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >=7))) || ((defined(__GNUC__) && __GNUC__ >= 7)) ) )
#error "not (C++11 and (clang >= 3.7 or gcc >= 7))"
#endif]])],
[CXX_WFLAGS="$CXX_WFLAGS -Wimplicit-fallthrough"]
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])])
CXXFLAGS=$SAVED_CXXFLAGS
AC_LANG_POP([C++])
AC_SUBST(CXX_WFLAGS,$CXX_WFLAGS)
AC_SUBST(C_WFLAGS,$C_WFLAGS)
AC_SUBST(NO_UNUSED_PARAMETER_FLAG,$NO_UNUSED_PARAMETER_FLAG)
AC_SUBST(NO_SIGN_COMPARE,$NO_SIGN_COMPARE)
AC_SUBST(NO_NON_VIRTUAL_DTOR_FLAG,$NO_NON_VIRTUAL_DTOR_FLAG)
AC_SUBST(NO_LOGICAL_OP_FLAG,$NO_LOGICAL_OP_FLAG)
AC_SUBST(WARN_OLD_STYLE_CAST,$WARN_OLD_STYLE_CAST)
AC_SUBST(WARN_EFFCPLUSPLUS,$WARN_EFFCPLUSPLUS)
dnl Checks for programs.
dnl AC_PROG_CC_C99 is deprecated since autoconf 2.70
m4_if(m4_version_compare(m4_defn([AC_AUTOCONF_VERSION]), [2.70]),
[-1], [AC_PROG_CC_C99], [AC_PROG_CC])
AC_PROG_CXX
LT_INIT([win32-dll])
dnl Check that CXX is really a working compiler
AC_LANG_PUSH([C++])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[#ifndef __cplusplus
#error "broken C++"
#endif]])],,
[CXX=;])
AC_LANG_POP([C++])
if test "x$CXX" = x ; then
AC_MSG_ERROR("You don't have a working C++ compiler.")
fi
AC_MSG_CHECKING([for std::isnan])
AC_LANG_PUSH([C++])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[#include <cmath>
int CPLIsNan(float f) { return std::isnan(f); }]])],
[
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_STD_IS_NAN, 1,
[Define to 1 if you have the `std::isnan' function.])
], [
AC_MSG_RESULT([no])
])
AC_LANG_POP([C++])
dnl switch between libtool and native build system
AC_ARG_WITH(libtool, [ --without-libtool Don't use libtool to build the library],,)
if test "$with_libtool" = "no"; then
AC_PROG_RANLIB
dnl AC_COMPILER_PIC as expanded by autoconf-2.68 doesn't work for the C++ part with clang++ 3.0 that doesn't like compiling .c programs
dnl so we inline the expanded code and fix it at hand.
dnl AC_COMPILER_PIC
echo 'void f(){}' > conftest.c
if test -z "`${CC-cc} $CFLAGS -fPIC -c conftest.c 2>&1`"; then
CFLAGS="$CFLAGS -fPIC"
fi
echo 'void f(){}' > conftest.cpp
if test -z "`${CXX-g++} $CXXFLAGS -fPIC -c conftest.cpp 2>&1`"; then
CXXFLAGS="$CXXFLAGS -fPIC"
fi
rm -f conftest*
dnl Trick so that LD_SHARED test works with sanitizer flags with clang
SAVED_CFLAGS=$CFLAGS
CFLAGS=`echo "$CFLAGS " | sed "s/-fsanitize=undefined //" | sed "s/-fsanitize=address //" | sed "s/-fsanitize=unsigned-integer-overflow //"`
AC_LD_SHARED
CFLAGS=$SAVED_CFLAGS
else
with_libtool=yes
fi
AC_SUBST(HAVE_LIBTOOL,$with_libtool)
dnl Checks for libraries.
AC_CHECK_LIB(dl,dlopen,,,)
dnl Needed on Solaris.
AC_CHECK_LIB(rt,nanosleep,,,)
dnl We don't need to add math library to all targets
case "${host_os}" in
cygwin* | mingw32* | pw32* | beos* | darwin*)
;;
*)
AC_CHECK_LIB(m,sin,,,)
;;
esac
dnl Checks for header files.
AC_CHECK_HEADERS(fcntl.h unistd.h dlfcn.h locale.h direct.h)
dnl Check for userfaultfd support
AC_CHECK_HEADERS([linux/userfaultfd.h], [ENABLE_UFFD="yes"], [ENABLE_UFFD="no"], [])
AC_SUBST(ENABLE_UFFD,$ENABLE_UFFD)
dnl cpl_vsil_unix_stdio_64.h requires linux/fs.h on Linux, and this isn't
dnl installed by default on Alpine
case "${host_os}" in
linux*)
AC_CHECK_HEADERS([linux/fs.h], [], [AC_MSG_ERROR([Unable to find linux/fs.h header])])
;;
*)
;;
esac
AC_C_BIGENDIAN
dnl Check for 64 bit file API
AC_UNIX_STDIO_64
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(unsigned long)
AC_CHECK_SIZEOF(void*)
dnl Checks for library functions.
AC_CHECK_FUNCS(vsnprintf)
AC_CHECK_FUNCS(getcwd)
AC_CHECK_FUNCS(readlink)
AC_CHECK_FUNCS(lstat)
AC_CHECK_FUNCS(posix_spawnp)
AC_CHECK_FUNCS(posix_memalign)
AC_CHECK_FUNCS(vfork)
AC_CHECK_FUNCS(mmap)
AC_CHECK_FUNCS(sigaction)
AC_CHECK_FUNCS(statvfs)
AC_CHECK_FUNCS(statvfs64)
AC_CHECK_FUNCS(getrlimit)
AC_MSG_CHECKING([for RLIMIT_AS])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/time.h>
#include <sys/resource.h>
]], [[
return RLIMIT_AS;
]])],[
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_RLIMIT_AS, 1,
[Define to 1 if you have the `RLIMIT_AS' constant.])
],[
AC_MSG_RESULT([no])
])
dnl Make sure at least these are checked under C++. Prototypes missing on
dnl some platforms.
AC_LANG_PUSH(C++)
AC_CHECK_FUNC_CUSTOM(gmtime_r,[#include <time.h>],[time_t t; struct tm ltime; t = time(0); gmtime_r( &t, <ime );])
AC_CHECK_FUNC_CUSTOM(localtime_r,[#include <time.h>],[time_t t; struct tm ltime; t = time(0); localtime_r( &t, <ime );])
AC_LANG_POP(C++)
AC_CHECK_HEADERS([xlocale.h],[HAVE_XLOCALE_H=1])
if test "$HAVE_XLOCALE_H" = "1"; then
AC_DEFINE_UNQUOTED(HAVE_XLOCALE_H, 1,
[Define if you have the <xlocale.h> header file.])
fi
AC_MSG_CHECKING([for uselocale])
AC_LANG_PUSH(C++)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#define _XOPEN_SOURCE 700
#include <locale.h>
]], [[
locale_t alocale = newlocale (LC_NUMERIC_MASK, "C", 0);
locale_t oldlocale = uselocale(alocale);
uselocale(oldlocale);
freelocale(alocale);
return 0;
]])],[
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_USELOCALE, 1,
[Define to 1 if you have the `uselocale' function.])
],[
AC_MSG_RESULT([no])
])
AC_LANG_POP(C++)
OPT_GDAL_FORMATS=
EXTRA_INCLUDES=
dnl ---------------------------------------------------------------------------
dnl Check for --enable-debug
dnl ---------------------------------------------------------------------------
AC_MSG_CHECKING([to enable debug build])
AC_ARG_ENABLE(debug,
AS_HELP_STRING([--enable-debug],
[enable debugging (disabled by default)]),
[HAVE_DEBUG=$enableval], [HAVE_DEBUG=yes])
CFLAGS_NOFTRAPV="$CFLAGS"
CXXFLAGS_NOFTRAPV="$CXXFLAGS"
if test "x$enable_debug" = "xyes" ; then
dnl Try to strip out optimization.
CXXFLAGS=`echo "$CXXFLAGS " | sed "s/-O2 //"`
CFLAGS=`echo "$CFLAGS " | sed "s/-O2 //"`
CXXFLAGS=`echo "$CXXFLAGS" | sed "s/-O //"`
CFLAGS=`echo "$CFLAGS" | sed "s/-O //"`
dnl remove existing -g to avoid duplicates.
CXXFLAGS=`echo "$CXXFLAGS" | sed "s/-g //"`
CFLAGS=`echo "$CFLAGS" | sed "s/-g //"`
dnl add -g and -DDEBUG
CXXFLAGS="$CXXFLAGS -g -DDEBUG"
CFLAGS="$CFLAGS -g -DDEBUG"
CFLAGS_NOFTRAPV="$CFLAGS"
CXXFLAGS_NOFTRAPV="$CXXFLAGS"
AC_MSG_RESULT([yes, modified CFLAGS="$CFLAGS"])
# Some clang version on 32 bits have linking error with 64bit operations (undefined reference to `__mulodi4')
AC_MSG_CHECKING([whether -ftrapv can be used])
rm -f testftrapv.c
echo 'int main(int argc, char** argv) { return (long long)argc * argc; } ' > testftrapv.c
if test -z "`${CC} ${CFLAGS} -ftrapv testftrapv.c -o testftrapv 2>&1`" ; then
AC_MSG_RESULT([yes])
CFLAGS="$CFLAGS -ftrapv"
CXXFLAGS="$CXXFLAGS -ftrapv"
else
AC_MSG_RESULT([no])
fi
rm -f testftrapv.* testftrapv
else
AC_MSG_RESULT([no, CFLAGS="$CFLAGS"])
fi
AC_SUBST(CFLAGS_NOFTRAPV,$CFLAGS_NOFTRAPV)
AC_SUBST(CXXFLAGS_NOFTRAPV,$CXXFLAGS_NOFTRAPV)
dnl ---------------------------------------------------------------------------
dnl Check if GCC 4.1 atomic builtins are really available
dnl (some GCC versions are broken w.r.t this on some exotic architectures...)
dnl ---------------------------------------------------------------------------
AC_MSG_CHECKING([whether GCC 4.1 atomic builtins are available])
rm -f atomicbuiltins.c
echo 'int main(int argc, char** argv) { int i; __sync_add_and_fetch(&i, 1); __sync_sub_and_fetch(&i, 1); __sync_bool_compare_and_swap(&i, 0, 1); return 0; } ' > atomicbuiltins.c
if test -z "`${CC} ${CFLAGS} atomicbuiltins.c -o atomicbuiltins 2>&1`" ; then
HAVE_GCC_ATOMIC_BUILTINS=yes
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_GCC_ATOMIC_BUILTINS,1, [Define to 1 if GCC atomic builtins are available])
else
HAVE_GCC_ATOMIC_BUILTINS=no
AC_MSG_RESULT([no])
fi
rm -rf atomicbuiltins.* atomicbuiltins
AC_SUBST(HAVE_GCC_ATOMIC_BUILTINS,$HAVE_GCC_ATOMIC_BUILTINS)
dnl ---------------------------------------------------------------------------
dnl Check if GCC bswap builtins are available
dnl ---------------------------------------------------------------------------
AC_MSG_CHECKING([whether GCC bswap builtins are available])
rm -f bswapbuiltins.c
echo 'int main(int argc, char** argv) { (void)__builtin_bswap32(0); (void)__builtin_bswap64(0); return 0; } ' >> bswapbuiltins.c
if test -z "`${CC} ${CFLAGS} bswapbuiltins.c -o bswapbuiltins 2>&1`" ; then
HAVE_GCC_BSWAP=yes
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_GCC_BSWAP,1, [Define to 1 if GCC bswap builtins are available])
else
HAVE_GCC_BSWAP=no
AC_MSG_RESULT([no])
fi
rm -rf bswapbuiltins.* bswapbuiltins
AC_SUBST(HAVE_GCC_BSWAP,$HAVE_GCC_BSWAP)
dnl ---------------------------------------------------------------------------
dnl Check if __uint128_t is available and usable
dnl ---------------------------------------------------------------------------
AC_MSG_CHECKING([for __uint128_t])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
]], [[
unsigned long long v1 = 1024ULL;
unsigned long long v2 = 0x8000000000000000ULL;
__uint128_t u = ((__uint128_t)v1)*((__uint128_t)v2);
return u == 0;
]])],[
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_UINT128_T, 1,
[Define to 1 if the system has the type __uint128_t])
],[
AC_MSG_RESULT([no])
])
dnl ---------------------------------------------------------------------------
dnl Check SSE availability
dnl ---------------------------------------------------------------------------
AC_ARG_WITH(sse,
[ --with-sse[=ARG] Detect SSE availability for some optimized routines (ARG=yes(default), no)],,)
AC_MSG_CHECKING([whether SSE is available at compile time])
if test "$with_sse" = "yes" -o "$with_sse" = ""; then
rm -f detectsse.cpp
echo '#ifdef __SSE__' > detectsse.cpp
echo '#include <xmmintrin.h>' >> detectsse.cpp
echo 'void foo() { float fEpsilon = 0.0000000000001f; __m128 xmm_small = _mm_load1_ps(&fEpsilon); } int main() { return 0; }' >> detectsse.cpp
echo '#else' >> detectsse.cpp
echo 'some_error' >> detectsse.cpp
echo '#endif' >> detectsse.cpp
if test -z "`${CXX} ${CXXFLAGS} ${CPPFLAGS} -o detectsse detectsse.cpp 2>&1`" ; then
AC_MSG_RESULT([yes])
SSEFLAGS=""
HAVE_SSE_AT_COMPILE_TIME=yes
else
if test -z "`${CXX} ${CXXFLAGS} ${CPPFLAGS} -msse -o detectsse detectsse.cpp 2>&1`" ; then
AC_MSG_RESULT([yes])
SSEFLAGS="-msse"
HAVE_SSE_AT_COMPILE_TIME=yes
else
AC_MSG_RESULT([no])
if test "$with_sse" = "yes"; then
AC_MSG_ERROR([--with-sse was requested, but SSE is not available])
fi
fi
fi
dnl On Solaris, the presence of SSE instructions is flagged in the binary
dnl and prevent it to run on non SSE hardware even if the instructions are
dnl not executed. So if the user did not explicitly requires SSE, test that
dnl we can run SSE binaries
if test "$HAVE_SSE_AT_COMPILE_TIME" = "yes"; then
case $host_os in
solaris*)
AC_MSG_CHECKING([whether SSE is available and needed at runtime])
if ./detectsse; then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
if test "$with_sse" = "yes"; then
echo "Caution: the generated binaries will not run on this system."
else
echo "Disabling SSE as it is not explicitly required"
HAVE_SSE_AT_COMPILE_TIME=""
SSEFLAGS=""
fi
fi
;;
esac
fi
if test "$HAVE_SSE_AT_COMPILE_TIME" = "yes"; then
CFLAGS="-DHAVE_SSE_AT_COMPILE_TIME $CFLAGS"
CXXFLAGS="-DHAVE_SSE_AT_COMPILE_TIME $CXXFLAGS"
fi
rm -rf detectsse*
else
AC_MSG_RESULT([no])
fi
AC_SUBST(SSEFLAGS,$SSEFLAGS)
dnl ---------------------------------------------------------------------------
dnl Check SSSE3 availability
dnl ---------------------------------------------------------------------------
AC_ARG_WITH(ssse3,
[ --with-ssse3[=ARG] Detect SSSE3 availability for some optimized routines (ARG=yes(default), no)],,)
AC_MSG_CHECKING([whether SSSE3 is available at compile time])
if test "$with_ssse3" = "yes" -o "$with_ssse3" = ""; then
rm -f detectssse3.cpp
echo '#ifdef __SSSE3__' > detectssse3.cpp
echo '#include <tmmintrin.h>' >> detectssse3.cpp
echo 'void foo() { __m128i xmm_i = _mm_set1_epi16(0); xmm_i = _mm_shuffle_epi8(xmm_i, xmm_i); } int main() { return 0; }' >> detectssse3.cpp
echo '#else' >> detectssse3.cpp
echo 'some_error' >> detectssse3.cpp
echo '#endif' >> detectssse3.cpp
if test -z "`${CXX} ${CXXFLAGS} ${CPPFLAGS} -o detectssse3 detectssse3.cpp 2>&1`" ; then
AC_MSG_RESULT([yes])
SSSE3FLAGS=""
HAVE_SSSE3_AT_COMPILE_TIME=yes
else
if test -z "`${CXX} ${CXXFLAGS} ${CPPFLAGS} -mssse3 -o detectssse3 detectssse3.cpp 2>&1`" ; then
AC_MSG_RESULT([yes])
SSSE3FLAGS="-mssse3"
HAVE_SSSE3_AT_COMPILE_TIME=yes
else
AC_MSG_RESULT([no])
if test "$with_ssse3" = "yes"; then
AC_MSG_ERROR([--with-ssse3 was requested, but SSSE3 is not available])
fi
fi
fi
dnl On Solaris, the presence of SSSE3 instructions is flagged in the binary
dnl and prevent it to run on non SSSE3 hardware even if the instructions are
dnl not executed. So if the user did not explicitly requires SSSE3, test that
dnl we can run SSSE3 binaries
if test "$HAVE_SSSE3_AT_COMPILE_TIME" = "yes"; then
case $host_os in
solaris*)
AC_MSG_CHECKING([whether SSSE3 is available and needed at runtime])
if ./detectssse3; then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
if test "$with_ssse3" = "yes"; then
echo "Caution: the generated binaries will not run on this system."
else
echo "Disabling SSSE3 as it is not explicitly required"
HAVE_SSSE3_AT_COMPILE_TIME=""
SSSE3FLAGS=""
fi
fi
;;
esac
fi
if test "$HAVE_SSSE3_AT_COMPILE_TIME" = "yes"; then
CFLAGS="-DHAVE_SSSE3_AT_COMPILE_TIME $CFLAGS"
CXXFLAGS="-DHAVE_SSSE3_AT_COMPILE_TIME $CXXFLAGS"
fi
rm -rf detectssse3*
else
AC_MSG_RESULT([no])
fi
AC_SUBST(SSSE3FLAGS,$SSSE3FLAGS)
dnl ---------------------------------------------------------------------------
dnl Check AVX availability
dnl ---------------------------------------------------------------------------
AC_ARG_WITH(avx,
[ --with-avx[=ARG] Detect AVX availability for some optimized routines (ARG=yes(default), no)],,)
AC_MSG_CHECKING([whether AVX is available at compile time])
if test "$with_avx" = "yes" -o "$with_avx" = ""; then
rm -f detectavx.cpp
echo '#ifdef __AVX__' > detectavx.cpp
echo '#include <immintrin.h>' >> detectavx.cpp
echo 'int foo() { unsigned int nXCRLow, nXCRHigh;' >> detectavx.cpp
echo '__asm__ ("xgetbv" : "=a" (nXCRLow), "=d" (nXCRHigh) : "c" (0));' >> detectavx.cpp
echo 'float fEpsilon = 0.0000000000001f;' >> detectavx.cpp
echo '__m256 ymm_small = _mm256_set_ps(fEpsilon,fEpsilon,fEpsilon,fEpsilon,fEpsilon,fEpsilon,fEpsilon,fEpsilon);' >> detectavx.cpp
echo 'return (int)nXCRLow + _mm256_movemask_ps(ymm_small); }' >> detectavx.cpp
echo 'int main(int argc, char**) { if( argc == 0 ) return foo(); return 0; }' >> detectavx.cpp
echo '#else' >> detectavx.cpp
echo 'some_error' >> detectavx.cpp
echo '#endif' >> detectavx.cpp
if test -z "`${CXX} ${CXXFLAGS} ${CPPFLAGS} -o detectavx detectavx.cpp 2>&1`" ; then
AC_MSG_RESULT([yes])
AVXFLAGS=""
HAVE_AVX_AT_COMPILE_TIME=yes
else
if test -z "`${CXX} ${CXXFLAGS} ${CPPFLAGS} -mavx -o detectavx detectavx.cpp 2>&1`" ; then
AC_MSG_RESULT([yes])
AVXFLAGS="-mavx"
HAVE_AVX_AT_COMPILE_TIME=yes
else
AC_MSG_RESULT([no])
if test "$with_avx" = "yes"; then
AC_MSG_ERROR([--with-avx was requested, but AVX is not available])
fi
fi
fi
dnl On Solaris, the presence of AVX instructions is flagged in the binary
dnl and prevent it to run on non AVX hardware even if the instructions are
dnl not executed. So if the user did not explicitly requires AVX, test that
dnl we can run AVX binaries
if test "$HAVE_AVX_AT_COMPILE_TIME" = "yes"; then
case $host_os in
solaris*)
AC_MSG_CHECKING([whether AVX is available and needed at runtime])
if ./detectavx; then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
if test "$with_avx" = "yes"; then
echo "Caution: the generated binaries will not run on this system."
else
echo "Disabling AVX as it is not explicitly required"
AVXFLAGS=""
HAVE_AVX_AT_COMPILE_TIME=""
fi
fi
;;
esac
fi
if test "$HAVE_AVX_AT_COMPILE_TIME" = "yes"; then
CFLAGS="-DHAVE_AVX_AT_COMPILE_TIME $CFLAGS"
CXXFLAGS="-DHAVE_AVX_AT_COMPILE_TIME $CXXFLAGS"
fi
rm -rf detectavx*
else
AC_MSG_RESULT([no])
fi
AC_SUBST(AVXFLAGS,$AVXFLAGS)
dnl ---------------------------------------------------------------------------
dnl Check for --enable-lto
dnl ---------------------------------------------------------------------------
AC_MSG_CHECKING([to enable LTO (link time optimization) build])
AC_ARG_ENABLE(lto,
AS_HELP_STRING([--enable-lto],
[enable LTO(link time optimization) (disabled by default)]))
CXXFLAGS_NO_LTO_IF_AVX_NONDEFAULT="$CXXFLAGS"
CXXFLAGS_NO_LTO_IF_SSSE3_NONDEFAULT="$CXXFLAGS"
if test "x$enable_lto" = "xyes" ; then
dnl remove existing -g.
CXXFLAGS=`echo "$CXXFLAGS" | sed "s/-g //"`
CFLAGS=`echo "$CFLAGS" | sed "s/-g //"`
dnl add -flto
CXXFLAGS="$CXXFLAGS -flto"
CFLAGS="$CFLAGS -flto"
LDFLAGS="$LDFLAGS -flto"
dnl in case we have avx available by default, then we can compile everything
dnl with -flto
if test "$HAVE_AVX_AT_COMPILE_TIME" = "yes"; then
if test "$AVXFLAGS" = ""; then
CXXFLAGS_NO_LTO_IF_AVX_NONDEFAULT="$CXXFLAGS"
fi
fi
if test "$HAVE_SSSE3_AT_COMPILE_TIME" = "yes"; then
if test "$SSSE3FLAGS" = ""; then
CXXFLAGS_NO_LTO_IF_SSSE3_NONDEFAULT="$CXXFLAGS"
fi
fi
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
fi
AC_SUBST(CXXFLAGS_NO_LTO_IF_AVX_NONDEFAULT,$CXXFLAGS_NO_LTO_IF_AVX_NONDEFAULT)
AC_SUBST(CXXFLAGS_NO_LTO_IF_SSSE3_NONDEFAULT,$CXXFLAGS_NO_LTO_IF_SSSE3_NONDEFAULT)
dnl ---------------------------------------------------------------------------
dnl Check if we need -lws2_32 (mingw)
dnl ---------------------------------------------------------------------------
echo "#include <winsock2.h>" > test_ws2_32.c
echo "#include <ws2tcpip.h>" >> test_ws2_32.c
echo "void foo() {}" >> test_ws2_32.c
if test -z "`${CC} -c test_ws2_32.c 2>&1`" ; then
LIBS="$LIBS -lws2_32"
fi
rm -f test_ws2_32*
dnl ---------------------------------------------------------------------------
dnl Check if we need -lpsapi (mingw)
dnl ---------------------------------------------------------------------------
echo "#include <windows.h>" > test_psapi.c
echo "#include <psapi.h>" >> test_psapi.c
echo "void foo() {}" >> test_psapi.c
if test -z "`${CC} -c test_psapi.c 2>&1`" ; then
LIBS="$LIBS -lpsapi"
fi
rm -f test_psapi*
dnl ---------------------------------------------------------------------------
dnl Check if we have getaddrinfo
dnl ---------------------------------------------------------------------------
echo "#include <sys/types.h>" > test_getaddrinfo.c
echo "#include <sys/socket.h>" >> test_getaddrinfo.c
echo "#include <netdb.h>" >> test_getaddrinfo.c
echo "void test() { getaddrinfo(0,0,0,0); }" >> test_getaddrinfo.c
HAVE_GETADDRINFO=NO
if test -z "`${CC} -c test_getaddrinfo.c 2>&1`" ; then
AC_DEFINE_UNQUOTED(HAVE_GETADDRINFO,1, [Define to 1 if you have the `getaddrinfo' function.])
fi
rm -f test_getaddrinfo*
dnl ---------------------------------------------------------------------------
dnl Check if user requests hiding internal symbols
dnl ---------------------------------------------------------------------------
AC_ARG_WITH(hide_internal_symbols,[ --with-hide-internal-symbols[=ARG] Try to hide internal symbols (ARG=yes/no)],,)
HAVE_HIDE_INTERNAL_SYMBOLS=no
if test "$with_hide_internal_symbols" = "yes"; then
AC_MSG_CHECKING([whether we should hide internal symbols])
rm -f hiddensymbols.c
echo 'int visible() { return 0; } __attribute__ ((visibility("default")))' >> hiddensymbols.c
echo 'int hidden() { return 0; }' >> hiddensymbols.c
if test -z "`${CC} -fvisibility=hidden -c hiddensymbols.c 2>&1`" ; then
HAVE_HIDE_INTERNAL_SYMBOLS=yes
else
HAVE_HIDE_INTERNAL_SYMBOLS=no
fi
if test "$HAVE_HIDE_INTERNAL_SYMBOLS" = "yes"; then
AC_MSG_RESULT([yes])
CFLAGS="$CFLAGS -fvisibility=hidden"
CXXFLAGS="$CXXFLAGS -fvisibility=hidden"
CFLAGS_NOFTRAPV="$CFLAGS_NOFTRAPV -fvisibility=hidden"
CXXFLAGS_NOFTRAPV="$CXXFLAGS_NOFTRAPV -fvisibility=hidden"
CXXFLAGS_NO_LTO_IF_AVX_NONDEFAULT="$CXXFLAGS_NO_LTO_IF_AVX_NONDEFAULT -fvisibility=hidden"
CXXFLAGS_NO_LTO_IF_SSSE3_NONDEFAULT="$CXXFLAGS_NO_LTO_IF_SSSE3_NONDEFAULT -fvisibility=hidden"
else
AC_MSG_RESULT([no])
fi
rm -f hiddensymbols.*
else
AC_MSG_CHECKING([whether we should hide internal symbols])
AC_MSG_RESULT([no])
fi
if test "$HAVE_HIDE_INTERNAL_SYMBOLS" = "yes" ; then
AC_DEFINE_UNQUOTED(USE_GCC_VISIBILITY_FLAG,1, [Define to 1 if you want to use the -fvisibility GCC flag])
fi
AC_SUBST(HAVE_HIDE_INTERNAL_SYMBOLS,$HAVE_HIDE_INTERNAL_SYMBOLS)
dnl ---------------------------------------------------------------------------
dnl Check if user requests renaming internal libtiff symbols
dnl ---------------------------------------------------------------------------
AC_ARG_WITH(rename_internal_libtiff_symbols,[ --with-rename-internal-libtiff-symbols[=ARG] Prefix internal libtiff symbols with gdal_ (ARG=yes/no)],,)
RENAME_INTERNAL_LIBTIFF_SYMBOLS=no
if test "x$with_rename_internal_libtiff_symbols" = "xyes" -o "x$with_rename_internal_libtiff_symbols" = "x"; then
RENAME_INTERNAL_LIBTIFF_SYMBOLS=yes
fi
AC_SUBST(RENAME_INTERNAL_LIBTIFF_SYMBOLS,$RENAME_INTERNAL_LIBTIFF_SYMBOLS)
dnl ---------------------------------------------------------------------------
dnl Check if user requests renaming internal libgeotiff symbols
dnl ---------------------------------------------------------------------------
AC_ARG_WITH(rename_internal_libgeotiff_symbols,[ --with-rename-internal-libgeotiff-symbols[=ARG] Prefix internal libgeotiff symbols with gdal_ (ARG=yes/no)],,)
RENAME_INTERNAL_LIBGEOTIFF_SYMBOLS=no
if test "x$with_rename_internal_libgeotiff_symbols" = "xyes" -o "x$with_rename_internal_libgeotiff_symbols" = "x"; then
RENAME_INTERNAL_LIBGEOTIFF_SYMBOLS=yes
fi
AC_SUBST(RENAME_INTERNAL_LIBGEOTIFF_SYMBOLS,$RENAME_INTERNAL_LIBGEOTIFF_SYMBOLS)
dnl ---------------------------------------------------------------------------
dnl Check if user requests renaming internal shapelib symbols
dnl ---------------------------------------------------------------------------
AC_ARG_WITH(rename_internal_shapelib_symbols,[ --with-rename-internal-shapelib-symbols[=ARG] Prefix internal shapelib symbols with gdal_ (ARG=yes/no)],,)
RENAME_INTERNAL_SHAPELIB_SYMBOLS=no
if test "x$with_rename_internal_shapelib_symbols" = "xyes" -o "x$with_rename_internal_shapelib_symbols" = "x"; then
RENAME_INTERNAL_SHAPELIB_SYMBOLS=yes
fi
AC_SUBST(RENAME_INTERNAL_SHAPELIB_SYMBOLS,$RENAME_INTERNAL_SHAPELIB_SYMBOLS)
dnl ---------------------------------------------------------------------------
dnl Check if user requests /usr/local to be included.
dnl ---------------------------------------------------------------------------
AC_MSG_CHECKING([for local include/lib path])
AC_ARG_WITH(local,[ --with-local[=dir] Include /usr/local or other local tree for INCLUDE/LIBS],,)
if test "$with_local" != "no" -a "$with_local" != "" ; then
if test "$with_local" = "yes" ; then
ADD_PREFIX=/usr/local
else
ADD_PREFIX=$with_local
fi
AC_MSG_RESULT(adding $ADD_PREFIX)
LIBS="$LIBS -L$ADD_PREFIX/lib"
CPPFLAGS="$CPPFLAGS -I$ADD_PREFIX/include"
else
AC_MSG_RESULT([none])
fi
dnl ---------------------------------------------------------------------
dnl ENABLE THREADS ONLY IF REQUESTED.
dnl ---------------------------------------------------------------------
THREAD_LIB=""
THREAD_FLAG=""
PTHREAD_ENABLED="no"
AC_ARG_WITH(threads,
[ --with-threads[=ARG] Include thread safe support (ARG=yes(default), no or linkopt)],,)
if test "$with_threads" = "yes" -o "$with_threads" = "" ; then
AC_CHECK_LIB(pthread,pthread_create,THREAD_FLAG=CPL_MULTIPROC_PTHREAD,,,)
if test -n "$THREAD_FLAG" ; then
THREAD_LIB="-lpthread"
else
# For Android, pthread_create is in Bionic libc
unset ac_cv_lib_pthread_pthread_create
AC_CHECK_LIB(c,pthread_create,THREAD_FLAG=CPL_MULTIPROC_PTHREAD,,,)
fi
AC_MSG_CHECKING([for PTHREAD_MUTEX_RECURSIVE])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#define _GNU_SOURCE
#include <pthread.h>
]], [[
return (PTHREAD_MUTEX_RECURSIVE);
]])],[
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_PTHREAD_MUTEX_RECURSIVE, 1,
[Define to 1 if you have the `PTHREAD_MUTEX_RECURSIVE' constant.])
],[
AC_MSG_RESULT([no])
])
AC_MSG_CHECKING([for PTHREAD_MUTEX_ADAPTIVE_NP])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#define _GNU_SOURCE
#include <pthread.h>
]], [[
return PTHREAD_MUTEX_ADAPTIVE_NP;
]])],[
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_PTHREAD_MUTEX_ADAPTIVE_NP, 1,
[Define to 1 if you have the `PTHREAD_MUTEX_ADAPTIVE_NP' constant.])
],[
AC_MSG_RESULT([no])
])
AC_MSG_CHECKING([for pthread_spinlock_t])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#define _GNU_SOURCE
#include <pthread.h>
]], [[
pthread_spinlock_t spin;
return 1;
]])],[
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_PTHREAD_SPINLOCK, 1,
[Define to 1 if you have the `pthread_spinlock_t' type.])
],[
AC_MSG_RESULT([no])
])
elif test "$with_threads" != "no" ; then
THREAD_FLAG=CPL_MULTIPROC_PTHREAD
THREAD_LIB="$with_threads"
AS_MESSAGE([checking whether we should include thread/mutex support......])
AC_MSG_RESULT([ using threads with link options "$THREAD_LIB".])
else
AS_MESSAGE([checking whether we should include thread/mutex support......])
AC_MSG_RESULT([ thread safe support disabled.])
fi