diff options
Diffstat (limited to 'source4/build/smb_build/check_cc.m4')
| -rw-r--r-- | source4/build/smb_build/check_cc.m4 | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/source4/build/smb_build/check_cc.m4 b/source4/build/smb_build/check_cc.m4 new file mode 100644 index 0000000000..0a430a4fcf --- /dev/null +++ b/source4/build/smb_build/check_cc.m4 @@ -0,0 +1,73 @@ +dnl SMB Build Environment CC Checks +dnl ------------------------------------------------------- +dnl Copyright (C) Stefan (metze) Metzmacher 2004 +dnl Released under the GNU GPL +dnl ------------------------------------------------------- +dnl +dnl _SMB_BUILD_CHECK_CC( +dnl 1:dummy +dnl ) + +dnl ####################################################### +dnl ### And now the implementation ### +dnl ####################################################### + +dnl _SMB_BUILD_CHECK_CC( +dnl 1:dummy +dnl ) +AC_DEFUN([_SMB_BUILD_CHECK_CC], +[ + AC_PROG_CC + if test x"$CC" = x""; then + AC_MSG_WARN([No c compiler was not found!]) + AC_MSG_ERROR([Please Install gcc from http://gcc.gnu.org/]) + fi + + AC_PROG_CC_STDC + + # compile with optimization and without debugging by default, but + # allow people to set their own preference. + if test "x$CFLAGS" = x; then + CFLAGS="-O ${CFLAGS}" + fi + + dnl needed before AC_TRY_COMPILE + AC_ISC_POSIX + + dnl Check if C compiler understands -c and -o at the same time + AC_PROG_CC_C_O + if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then + BROKEN_CC= + else + BROKEN_CC=# + fi + AC_SUBST(BROKEN_CC) + + AC_CACHE_CHECK([that the C compiler can precompile header files],samba_cv_precompiled_headers, [ + dnl Check whether the compiler can generate precompiled headers + touch conftest.h + if ${CC-cc} conftest.h 2> /dev/null && test -f conftest.h.gch; then + samba_cv_precompiled_headers=yes + else + samba_cv_precompiled_headers=no + fi]) + PCH_AVAILABLE="#" + if test x"$samba_cv_precompiled_headers" = x"yes"; then + PCH_AVAILABLE="" + fi + AC_SUBST(PCH_AVAILABLE) + + + dnl Check if the C compiler understands volatile (it should, being ANSI). + AC_CACHE_CHECK([that the C compiler understands volatile],samba_cv_volatile, [ + AC_TRY_COMPILE([#include <sys/types.h>],[volatile int i = 0], + samba_cv_volatile=yes,samba_cv_volatile=no)]) + if test x"$samba_cv_volatile" = x"yes"; then + AC_DEFINE(HAVE_VOLATILE, 1, [Whether the C compiler understands volatile]) + fi + + AC_C_CONST + AC_C_INLINE + + AC_PROG_CPP +]) |