chore(CMake): Add option ENABLE_DATA_SQL_SERVER_BIG_STRINGS, auto-det…

…ection of msodbcsql.h on Linux and macOS
pocoproject · Oct 18, 2024 · a120310 · a120310
1 parent 761c19f
commit a120310
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Showing 3 changed files with 43 additions and 1 deletion.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -155,9 +155,11 @@ endif()
 if(ODBC_FOUND)
 	option(ENABLE_DATA "Enable Data" ON)
 	option(ENABLE_DATA_ODBC "Enable Data ODBC" ON)
+	option(ENABLE_DATA_SQL_SERVER_BIG_STRINGS "Enable MS SQL Server big strings" ON)
 else()
 	option(ENABLE_DATA "Enable Data" OFF)
 	option(ENABLE_DATA_ODBC "Enable Data ODBC" OFF)
+	option(ENABLE_DATA_SQL_SERVER_BIG_STRINGS "Enable MS SQL Server big strings" OFF)
 endif()
 
 # Allow enabling and disabling components

diff --git a/Data/ODBC/CMakeLists.txt b/Data/ODBC/CMakeLists.txt
@@ -29,6 +29,44 @@ target_include_directories(DataODBC
 )
 target_compile_definitions(DataODBC PUBLIC THREADSAFE)
 
+# Search for MS ODBC header file which is a pre-requisite to enable
+# ENABLE_DATA_SQL_SERVER_BIG_STRINGS
+find_file(
+	_msodbc_h
+
+	msodbcsql.h
+
+	HINTS
+
+	/usr/include
+	#macOS
+	/opt/homebrew/include/msodbcsql18
+	/opt/homebrew/include/msodbcsql17
+	#Linux
+	/opt/microsoft/msodbcsql18/include
+	/opt/microsoft/msodbcsql17/include/
+	/opt/microsoft/msodbcsql/include/
+	# Windows?
+
+	NO_CACHE
+)
+
+if (_msodbc_h)
+	get_filename_component(MSODBC_DIR ${_msodbc_h} DIRECTORY CACHE)
+	message(STATUS "ODBC: Found msodbcsql.h in: ${MSODBC_DIR}")
+	target_include_directories(DataODBC PUBLIC "${MSODBC_DIR}")
+
+	if (ENABLE_DATA_SQL_SERVER_BIG_STRINGS)
+		target_compile_definitions(DataODBC PUBLIC POCO_DATA_SQL_SERVER_BIG_STRINGS=1)
+	else()
+		target_compile_definitions(DataODBC PUBLIC POCO_DATA_SQL_SERVER_BIG_STRINGS=0)
+	endif()
+else()
+	# Disable MS SQL specific setting when msodbcsql.h is not present
+	set(ENABLE_DATA_SQL_SERVER_BIG_STRINGS OFF CACHE BOOL FORCE "Enable MS SQL Server big strings")
+endif()
+unset(_msodbc_h)
+
 POCO_INSTALL(DataODBC)
 POCO_GENERATE_PACKAGE(DataODBC)
 

diff --git a/Data/ODBC/include/Poco/Data/ODBC/ODBC.h b/Data/ODBC/include/Poco/Data/ODBC/ODBC.h
@@ -71,7 +71,9 @@
 		//   affect performance (more memory preallocated
 		//   for prepared statements in order to safely
 		//   accomodate data returned at execution)
-		#define POCO_DATA_SQL_SERVER_BIG_STRINGS 1
+		#if !defined(POCO_DATA_SQL_SERVER_BIG_STRINGS)
+			#define POCO_DATA_SQL_SERVER_BIG_STRINGS 1
+		#endif
 	#endif
 #endif