diff options
Diffstat (limited to '')
| -rw-r--r-- | m4/ax_cc.m4 | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/m4/ax_cc.m4 b/m4/ax_cc.m4 new file mode 100644 index 0000000..ecdfd31 --- /dev/null +++ b/m4/ax_cc.m4 @@ -0,0 +1,195 @@ +dnl # +dnl # check if were compiling with CLANG, autoconf GCC macro identifies CLANG as GCC +dnl # +AC_DEFUN([AX_CC_IS_CLANG],[ + AC_CACHE_CHECK([if compiler is clang], [ax_cv_cc_clang],[ + + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([], [[ + #ifndef __clang__ + not clang + #endif + ]])], + [ax_cv_cc_clang=yes], + [ax_cv_cc_clang=no]) + ]) +]) + +AC_DEFUN([AX_CC_QUNUSED_ARGUMENTS_FLAG],[ + AC_CACHE_CHECK([for the compiler flag "-Qunused-arguments"], [ax_cv_cc_qunused_arguments_flag],[ + + CFLAGS_SAVED=$CFLAGS + CFLAGS="$CFLAGS -Werror -Qunused-arguments -foobar" + + AC_LANG_PUSH(C) + AC_TRY_COMPILE( + [], + [return 0;], + [ax_cv_cc_qunused_arguments_flag="yes"], + [ax_cv_cc_qunused_arguments_flag="no"]) + AC_LANG_POP + + CFLAGS="$CFLAGS_SAVED" + ]) +]) + +AC_DEFUN([AX_CC_NO_UNKNOWN_WARNING_OPTION_FLAG],[ + AC_CACHE_CHECK([for the compiler flag "-Wno-unknown-warning-option"], [ax_cv_cc_no_unknown_warning_option_flag],[ + + CFLAGS_SAVED=$CFLAGS + CFLAGS="-Werror -Wno-unknown-warning-option" + + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([], [[ + /* + * gcc will happily accept -Wno-unknown-warning-option + * only emitting an error about it, if an error ocurrs in the source file. + */ + #if defined(__GNUC__) && !defined(__clang__) + gcc sucks + #endif + + return 0; + ]])], + [ax_cv_cc_no_unknown_warning_option_flag=yes], + [ax_cv_cc_no_unknown_warning_option_flag=no]) + + CFLAGS="$CFLAGS_SAVED" + ]) +]) + + + +AC_DEFUN([AX_CC_WEVERYTHING_FLAG],[ + AC_CACHE_CHECK([for the compiler flag "-Weverything"], [ax_cv_cc_weverything_flag],[ + + CFLAGS_SAVED=$CFLAGS + CFLAGS="$CFLAGS -Werror -Weverything -Wno-unused-macros -Wno-unreachable-code-return" + + AC_LANG_PUSH(C) + AC_TRY_COMPILE( + [], + [return 0;], + [ax_cv_cc_weverything_flag="yes"], + [ax_cv_cc_weverything_flag="no"]) + AC_LANG_POP + + CFLAGS="$CFLAGS_SAVED" + ]) +]) + +AC_DEFUN([AX_CC_WDOCUMENTATION_FLAG],[ + AC_CACHE_CHECK([for the compiler flag "-Wdocumentation"], [ax_cv_cc_wdocumentation_flag],[ + + CFLAGS_SAVED=$CFLAGS + CFLAGS="$CFLAGS -Werror -Wdocumentation" + + AC_LANG_PUSH(C) + AC_TRY_COMPILE( + [], + [return 0;], + [ax_cv_cc_wdocumentation_flag="yes"], + [ax_cv_cc_wdocumentation_flag="no"]) + AC_LANG_POP + + CFLAGS="$CFLAGS_SAVED" + ]) +]) + +AC_DEFUN([AX_CC_NO_DATE_TIME_FLAG],[ + AC_CACHE_CHECK([for the compiler flag "-Wno-date-time"], [ax_cv_cc_no_date_time_flag],[ + + CFLAGS_SAVED=$CFLAGS + CFLAGS="$CFLAGS -Werror -Wno-date-time" + + AC_LANG_PUSH(C) + AC_TRY_COMPILE( + [], + [return 0;], + [ax_cv_cc_no_date_time_flag="yes"], + [ax_cv_cc_no_date_time_flag="no"]) + AC_LANG_POP + + CFLAGS="$CFLAGS_SAVED" + ]) +]) + +AC_DEFUN([AX_CC_PTHREAD_FLAG],[ + AC_CACHE_CHECK([for the compiler flag "-pthread"], [ax_cv_cc_pthread_flag],[ + + CFLAGS_SAVED=$CFLAGS + CFLAGS="$CFLAGS -Werror -pthread" + + AC_LANG_PUSH(C) + AC_TRY_COMPILE( + [], + [return 0;], + [ax_cv_cc_pthread_flag="yes"], + [ax_cv_cc_pthread_flag="no"]) + AC_LANG_POP + + CFLAGS="$CFLAGS_SAVED" + ]) +]) + +dnl # +dnl # Determine the number of system cores we have +dnl # +AC_DEFUN([AX_SYSTEM_CORES],[ + AC_CACHE_CHECK([number of system cores], [ax_cv_system_cores], + [ + AC_LANG_PUSH(C) + AC_TRY_RUN( + [ + #include <stdio.h> + #include <stdint.h> + #ifdef _WIN32 + # include <windows.h> + #elif MACOS + # include <sys/param.h> + # include <sys/sysctl.h> + #else + # include <unistd.h> + #endif + + int main (int argc, char *argv[]) + { + uint32_t count; + + #ifdef WIN32 + SYSTEM_INFO sysinfo; + GetSystemInfo(&sysinfo); + + count = sysinfo.dwNumberOfProcessors; + + #elif MACOS + int nm[2]; + size_t len = 4; + + nm[0] = CTL_HW; + nm[1] = HW_AVAILCPU; + sysctl(nm, 2, &count, &len, NULL, 0); + + if(count < 1) { + nm[1] = HW_NCPU; + sysctl(nm, 2, &count, &len, NULL, 0); + if(count < 1) { + count = 1; + } + } + + #else + count = sysconf(_SC_NPROCESSORS_ONLN); + #endif + + return count; + } + ], + [ax_cv_system_cores=$?], + [ax_cv_system_cores=$?], + [ax_cv_system_cores=] + ) + AC_LANG_POP + ]) +]) + |