diff --git a/ext/pcre/config0.m4 b/ext/pcre/config0.m4
index 6d95d78c07f7d..7775356a7bcde 100644
--- a/ext/pcre/config0.m4
+++ b/ext/pcre/config0.m4
@@ -45,18 +45,44 @@ if test "$PHP_EXTERNAL_PCRE" != "no"; then
       [AC_DEFINE([HAVE_PCRE_JIT_SUPPORT], [1])])
   ])
 
-  PHP_NEW_EXTENSION(pcre, php_pcre.c, no,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
+  PHP_NEW_EXTENSION([pcre],
+    [php_pcre.c],
+    [no],,
+    [-DZEND_ENABLE_STATIC_TSRMLS_CACHE=1])
   PHP_INSTALL_HEADERS([ext/pcre], [php_pcre.h])
 else
   AC_MSG_CHECKING([for PCRE library to use])
   AC_MSG_RESULT([bundled])
-  pcrelib_sources="pcre2lib/pcre2_auto_possess.c pcre2lib/pcre2_chartables.c pcre2lib/pcre2_compile.c \
-      pcre2lib/pcre2_config.c pcre2lib/pcre2_context.c pcre2lib/pcre2_chkdint.c pcre2lib/pcre2_dfa_match.c pcre2lib/pcre2_error.c \
-  pcre2lib/pcre2_jit_compile.c pcre2lib/pcre2_maketables.c pcre2lib/pcre2_match.c pcre2lib/pcre2_match_data.c \
-  pcre2lib/pcre2_newline.c pcre2lib/pcre2_ord2utf.c pcre2lib/pcre2_pattern_info.c pcre2lib/pcre2_serialize.c \
-  pcre2lib/pcre2_string_utils.c pcre2lib/pcre2_study.c pcre2lib/pcre2_substitute.c  pcre2lib/pcre2_substring.c \
-  pcre2lib/pcre2_tables.c pcre2lib/pcre2_ucd.c pcre2lib/pcre2_valid_utf.c pcre2lib/pcre2_xclass.c \
-  pcre2lib/pcre2_find_bracket.c pcre2lib/pcre2_convert.c pcre2lib/pcre2_extuni.c pcre2lib/pcre2_script_run.c"
+  pcrelib_sources=m4_normalize(["
+    pcre2lib/pcre2_auto_possess.c
+    pcre2lib/pcre2_chartables.c
+    pcre2lib/pcre2_chkdint.c
+    pcre2lib/pcre2_compile.c
+    pcre2lib/pcre2_config.c
+    pcre2lib/pcre2_context.c
+    pcre2lib/pcre2_convert.c
+    pcre2lib/pcre2_dfa_match.c
+    pcre2lib/pcre2_error.c
+    pcre2lib/pcre2_extuni.c
+    pcre2lib/pcre2_find_bracket.c
+    pcre2lib/pcre2_jit_compile.c
+    pcre2lib/pcre2_maketables.c
+    pcre2lib/pcre2_match_data.c
+    pcre2lib/pcre2_match.c
+    pcre2lib/pcre2_newline.c
+    pcre2lib/pcre2_ord2utf.c
+    pcre2lib/pcre2_pattern_info.c
+    pcre2lib/pcre2_script_run.c
+    pcre2lib/pcre2_serialize.c
+    pcre2lib/pcre2_string_utils.c
+    pcre2lib/pcre2_study.c
+    pcre2lib/pcre2_substitute.c
+    pcre2lib/pcre2_substring.c
+    pcre2lib/pcre2_tables.c
+    pcre2lib/pcre2_ucd.c
+    pcre2lib/pcre2_valid_utf.c
+    pcre2lib/pcre2_xclass.c
+  "])
 
   AX_CHECK_COMPILE_FLAG([-Wno-implicit-fallthrough],
     [PHP_PCRE_CFLAGS="$PHP_PCRE_CFLAGS -Wno-implicit-fallthrough"],,
@@ -88,7 +114,10 @@ else
       [AC_DEFINE([HAVE_PCRE_VALGRIND_SUPPORT], [1],
         [Define to 1 if pcre has Valgrind support enabled.])])])
 
-  PHP_NEW_EXTENSION(pcre, $pcrelib_sources php_pcre.c, no,,$PHP_PCRE_CFLAGS)
+  PHP_NEW_EXTENSION([pcre],
+    [$pcrelib_sources php_pcre.c],
+    [no],,
+    [$PHP_PCRE_CFLAGS])
   PHP_ADD_BUILD_DIR([$ext_builddir/pcre2lib])
   PHP_INSTALL_HEADERS([ext/pcre], [php_pcre.h pcre2lib/])
 fi