cmake: avoid linking executable for some tests with cmake 3.6+

With CMAKE_TRY_COMPILE_TARGET_TYPE set to STATIC_LIBRARY, the try_compile()
(which is used by check_c_source_compiles()) will build static library
instead of executable. This avoids linking additional libraries in and thus
speeds up those checks a little.

This commit also avoids #3743 (GSSAPI build errors) on itself with cmake
3.6 or above. That issue was fixed separately for all versions.

Ref: #3744
This commit is contained in:
Jakub Zakrzewski 2019-04-07 12:43:38 +02:00
parent 639cfeb0f8
commit be17f298ff

View File

@ -24,6 +24,8 @@ else()
add_header_include(HAVE_SYS_SOCKET_H "sys/socket.h")
endif()
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
check_c_source_compiles("${_source_epilogue}
int main(void) {
recv(0, 0, 0, 0);
@ -177,6 +179,44 @@ int main(void) {
return 0;
}" HAVE_STRUCT_TIMEVAL)
set(HAVE_SIG_ATOMIC_T 1)
set(CMAKE_REQUIRED_FLAGS)
if(HAVE_SIGNAL_H)
set(CMAKE_REQUIRED_FLAGS "-DHAVE_SIGNAL_H")
set(CMAKE_EXTRA_INCLUDE_FILES "signal.h")
endif()
check_type_size("sig_atomic_t" SIZEOF_SIG_ATOMIC_T)
if(HAVE_SIZEOF_SIG_ATOMIC_T)
check_c_source_compiles("
#ifdef HAVE_SIGNAL_H
# include <signal.h>
#endif
int main(void) {
static volatile sig_atomic_t dummy = 0;
(void)dummy;
return 0;
}" HAVE_SIG_ATOMIC_T_NOT_VOLATILE)
if(NOT HAVE_SIG_ATOMIC_T_NOT_VOLATILE)
set(HAVE_SIG_ATOMIC_T_VOLATILE 1)
endif()
endif()
if(HAVE_WINDOWS_H)
set(CMAKE_EXTRA_INCLUDE_FILES winsock2.h)
else()
set(CMAKE_EXTRA_INCLUDE_FILES)
if(HAVE_SYS_SOCKET_H)
set(CMAKE_EXTRA_INCLUDE_FILES sys/socket.h)
endif()
endif()
check_type_size("struct sockaddr_storage" SIZEOF_STRUCT_SOCKADDR_STORAGE)
if(HAVE_SIZEOF_STRUCT_SOCKADDR_STORAGE)
set(HAVE_STRUCT_SOCKADDR_STORAGE 1)
endif()
unset(CMAKE_TRY_COMPILE_TARGET_TYPE)
if(NOT DEFINED CMAKE_TOOLCHAIN_FILE)
# if not cross-compilation...
include(CheckCSourceRuns)
@ -222,38 +262,3 @@ if(NOT DEFINED CMAKE_TOOLCHAIN_FILE)
}" HAVE_POLL_FINE)
endif()
set(HAVE_SIG_ATOMIC_T 1)
set(CMAKE_REQUIRED_FLAGS)
if(HAVE_SIGNAL_H)
set(CMAKE_REQUIRED_FLAGS "-DHAVE_SIGNAL_H")
set(CMAKE_EXTRA_INCLUDE_FILES "signal.h")
endif()
check_type_size("sig_atomic_t" SIZEOF_SIG_ATOMIC_T)
if(HAVE_SIZEOF_SIG_ATOMIC_T)
check_c_source_compiles("
#ifdef HAVE_SIGNAL_H
# include <signal.h>
#endif
int main(void) {
static volatile sig_atomic_t dummy = 0;
(void)dummy;
return 0;
}" HAVE_SIG_ATOMIC_T_NOT_VOLATILE)
if(NOT HAVE_SIG_ATOMIC_T_NOT_VOLATILE)
set(HAVE_SIG_ATOMIC_T_VOLATILE 1)
endif()
endif()
if(HAVE_WINDOWS_H)
set(CMAKE_EXTRA_INCLUDE_FILES winsock2.h)
else()
set(CMAKE_EXTRA_INCLUDE_FILES)
if(HAVE_SYS_SOCKET_H)
set(CMAKE_EXTRA_INCLUDE_FILES sys/socket.h)
endif()
endif()
check_type_size("struct sockaddr_storage" SIZEOF_STRUCT_SOCKADDR_STORAGE)
if(HAVE_SIZEOF_STRUCT_SOCKADDR_STORAGE)
set(HAVE_STRUCT_SOCKADDR_STORAGE 1)
endif()