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Try to make sure GCC is providing C99 inline semantics

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This commit is contained in:
Chris Robinson
2013-11-24 17:37:48 -08:00
parent 25b9c3d0c1
commit 4830b1afe7
1 changed files with 45 additions and 24 deletions
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CMakeLists.txt
+45 -24
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@@ -113,37 +113,58 @@ IF(HAVE_STD_C99)
SET(CMAKE_C_FLAGS "-std=c99 ${CMAKE_C_FLAGS}")
ENDIF()
# TODO: Once we truly require C99, these restrict and inline checks should go
# away. Currently they're needed to maintain MSVC compatibility.
CHECK_C_SOURCE_COMPILES("int *restrict foo;
int main() {return 0;}" HAVE_RESTRICT)
IF(NOT HAVE_RESTRICT)
# Slightly convoluted way to do this, because MSVC may barf if restrict is
# defined to __restrict.
CHECK_C_SOURCE_COMPILES("#define restrict __restrict
#include <stdlib.h>
int *restrict foo;
int main() {return 0;}" HAVE___RESTRICT)
IF(HAVE___RESTRICT)
ADD_DEFINITIONS(-Drestrict=__restrict)
ELSE()
ADD_DEFINITIONS("-Drestrict=")
# MSVC may need workarounds for C99 restrict and inline
IF(MSVC)
# TODO: Once we truly require C99, these restrict and inline checks should go
# away.
CHECK_C_SOURCE_COMPILES("int *restrict foo;
int main() {return 0;}" HAVE_RESTRICT)
IF(NOT HAVE_RESTRICT)
# Slightly convoluted way to do this, because MSVC may barf if restrict is
# defined to __restrict.
CHECK_C_SOURCE_COMPILES("#define restrict __restrict
#include <stdlib.h>
int *restrict foo;
int main() {return 0;}" HAVE___RESTRICT)
IF(HAVE___RESTRICT)
ADD_DEFINITIONS(-Drestrict=__restrict)
SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Drestrict=__restrict")
ELSE()
ADD_DEFINITIONS("-Drestrict=")
SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Drestrict=")
ENDIF()
ENDIF()
CHECK_C_SOURCE_COMPILES("inline void foo(void) { }
int main() {return 0;}" HAVE_INLINE)
IF(NOT HAVE_INLINE)
CHECK_C_SOURCE_COMPILES("__inline void foo(void) { }
int main() {return 0;}" HAVE___INLINE)
IF(NOT HAVE___INLINE)
MESSAGE(FATAL_ERROR "No inline keyword found, please report!")
ENDIF()
ADD_DEFINITIONS(-Dinline=__inline)
SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Dinline=__inline")
ENDIF()
ENDIF()
CHECK_C_SOURCE_COMPILES("inline void foo(void) { }
int main() {return 0;}" HAVE_INLINE)
IF(NOT HAVE_INLINE)
CHECK_C_SOURCE_COMPILES("__inline void foo(void) { }
int main() {return 0;}" HAVE___INLINE)
IF(NOT HAVE___INLINE)
MESSAGE(FATAL_ERROR "No inline keyword found, please report!")
# Make sure we have C99-style inline semantics with GCC (4.3 or newer).
IF(CMAKE_COMPILER_IS_GNUCC)
SET(OLD_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
# Force no inlining for the next test.
SET(CMAKE_REQUIRED_FLAGS "${OLD_REQUIRED_FLAGS} -fno-inline")
CHECK_C_SOURCE_COMPILES("extern inline int foo() { return 0; }
int main() {return foo();}" INLINE_IS_C99)
IF(NOT INLINE_IS_C99)
MESSAGE(FATAL_ERROR "Your compiler does not seem to have C99 inline semantics!
Please update your compiler for better C99 compliance.")
ENDIF()
ADD_DEFINITIONS(-Dinline=__inline)
SET(CMAKE_REQUIRED_FLAGS "${OLD_REQUIRED_FLAGS}")
ENDIF()
# Add definitions, compiler switches, etc.
INCLUDE_DIRECTORIES("${OpenAL_SOURCE_DIR}/include" "${OpenAL_BINARY_DIR}")
IF(CMAKE_VERSION VERSION_LESS "2.8.8")