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CMake: Fix detection of trunc() for Windows

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This commit is contained in:
Albrecht Schlosser 2024-04-05 17:06:27 +02:00
parent fe6ab4ebc2
commit 2f1b8fc726
1 changed files with 17 additions and 12 deletions
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21
CMake/resources.cmake
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@ -167,12 +167,16 @@ mark_as_advanced(LIB_m)
# functions # functions
include(CheckFunctionExists) include(CheckFunctionExists)
# save CMAKE_REQUIRED_LIBRARIES (is this really necessary ?) # Save CMAKE_REQUIRED_LIBRARIES
# Note: CMAKE_REQUIRED_LIBRARIES must be set for each search and
# reset after the search to avoid to influence subsequent searches.
# The original value is restored after all searches.
if(DEFINED CMAKE_REQUIRED_LIBRARIES) if(DEFINED CMAKE_REQUIRED_LIBRARIES)
set(SAVED_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES}) set(SAVED_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
else(DEFINED CMAKE_REQUIRED_LIBRARIES) else()
unset(SAVED_REQUIRED_LIBRARIES) unset(SAVED_REQUIRED_LIBRARIES)
endif(DEFINED CMAKE_REQUIRED_LIBRARIES) endif()
set(CMAKE_REQUIRED_LIBRARIES) set(CMAKE_REQUIRED_LIBRARIES)
if(HAVE_DLFCN_H) if(HAVE_DLFCN_H)
@ -208,11 +212,12 @@ check_function_exists(vsnprintf HAVE_VSNPRINTF)
check_function_exists(setenv HAVE_SETENV) check_function_exists(setenv HAVE_SETENV)
if(LIB_m) # Windows doesn't require '-lm' for trunc(), other platforms do
if(LIB_m AND NOT WIN32)
set(CMAKE_REQUIRED_LIBRARIES ${LIB_m}) set(CMAKE_REQUIRED_LIBRARIES ${LIB_m})
endif()
check_function_exists(trunc HAVE_TRUNC) check_function_exists(trunc HAVE_TRUNC)
set(CMAKE_REQUIRED_LIBRARIES) set(CMAKE_REQUIRED_LIBRARIES)
endif(LIB_m)
if(HAVE_SCANDIR AND NOT HAVE_SCANDIR_POSIX) if(HAVE_SCANDIR AND NOT HAVE_SCANDIR_POSIX)
set(MSG "POSIX compatible scandir") set(MSG "POSIX compatible scandir")
@ -231,13 +236,13 @@ if(HAVE_SCANDIR AND NOT HAVE_SCANDIR_POSIX)
endif(HAVE_SCANDIR AND NOT HAVE_SCANDIR_POSIX) endif(HAVE_SCANDIR AND NOT HAVE_SCANDIR_POSIX)
mark_as_advanced(HAVE_SCANDIR_POSIX) mark_as_advanced(HAVE_SCANDIR_POSIX)
# restore CMAKE_REQUIRED_LIBRARIES (is this really necessary ?) # restore CMAKE_REQUIRED_LIBRARIES
if(DEFINED SAVED_REQUIRED_LIBRARIES) if(DEFINED SAVED_REQUIRED_LIBRARIES)
set(CMAKE_REQUIRED_LIBRARIES ${SAVED_REQUIRED_LIBRARIES}) set(CMAKE_REQUIRED_LIBRARIES ${SAVED_REQUIRED_LIBRARIES})
unset(SAVED_REQUIRED_LIBRARIES) unset(SAVED_REQUIRED_LIBRARIES)
else(DEFINED SAVED_REQUIRED_LIBRARIES) else()
unset(CMAKE_REQUIRED_LIBRARIES) unset(CMAKE_REQUIRED_LIBRARIES)
endif(DEFINED SAVED_REQUIRED_LIBRARIES) endif()
####################################################################### #######################################################################
# packages # packages