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