diff options
Diffstat (limited to 'source4/build/m4/check_cc.m4')
| -rw-r--r-- | source4/build/m4/check_cc.m4 | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/source4/build/m4/check_cc.m4 b/source4/build/m4/check_cc.m4 new file mode 100644 index 0000000000..68e938b794 --- /dev/null +++ b/source4/build/m4/check_cc.m4 @@ -0,0 +1,89 @@ +dnl SMB Build Environment CC Checks +dnl ------------------------------------------------------- +dnl Copyright (C) Stefan (metze) Metzmacher 2004 +dnl Released under the GNU GPL +dnl ------------------------------------------------------- +dnl + +AC_PROG_CC +if test x"$CC" = x""; then + AC_MSG_WARN([No c compiler was not found!]) + AC_MSG_ERROR([Please Install gcc from http://gcc.gnu.org/]) +fi + +dnl needed before AC_TRY_COMPILE +AC_ISC_POSIX + +dnl Check if C compiler understands -c and -o at the same time +AC_PROG_CC_C_O +if eval "test \"`echo '$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"$samba_cv_volatile" = x"yes"; then + AC_DEFINE(HAVE_VOLATILE, 1, [Whether the C compiler understands volatile]) +fi + +############################################ +# check if the compiler can do immediate structures +AC_CACHE_CHECK([for immediate structures],samba_cv_immediate_structures, [ + AC_TRY_COMPILE([ +#include <stdio.h>], +[ + typedef struct {unsigned x;} FOOBAR; + #define X_FOOBAR(x) ((FOOBAR) { x }) + #define FOO_ONE X_FOOBAR(1) + FOOBAR f = FOO_ONE; + static struct { + FOOBAR y; + } f2[] = { + {FOO_ONE} + }; +], + samba_cv_immediate_structures=yes,samba_cv_immediate_structures=no)]) +if test x"$samba_cv_immediate_structures" = x"yes"; then + AC_DEFINE(HAVE_IMMEDIATE_STRUCTURES,1,[Whether the compiler supports immediate structures]) +fi + +AC_MSG_CHECKING([for test routines]) +AC_TRY_RUN([#include "${srcdir-.}/build/tests/trivial.c"], + AC_MSG_RESULT(yes), + AC_MSG_ERROR([cant find test code. Aborting config]), + AC_MSG_WARN([cannot run when cross-compiling])) + +# +# Check if the compiler can handle the options we selected by +# --enable-*developer +# +if test -n "$DEVELOPER_CFLAGS"; then + OLD_CFLAGS="${CFLAGS}" + CFLAGS="${CFLAGS} ${DEVELOPER_CFLAGS}" + AC_MSG_CHECKING([that the C compiler can use the DEVELOPER_CFLAGS]) + AC_TRY_RUN([#include "${srcdir-.}/build/tests/trivial.c"], + AC_MSG_RESULT(yes), + DEVELOPER_CFLAGS=""; AC_MSG_RESULT(no), + AC_MSG_WARN([cannot run when cross-compiling])) + CFLAGS="${OLD_CFLAGS}" +fi |