diff options
| -rw-r--r-- | configure.ac | 112 |
1 files changed, 56 insertions, 56 deletions
diff --git a/configure.ac b/configure.ac index 9d10ffb..ce13421 100644 --- a/configure.ac +++ b/configure.ac @@ -24,6 +24,62 @@ m4_version_prereq([2.70],[],[AC_PROG_CC_C99]) AC_PROG_CPP AC_PROG_MAKE_SET +# Checks for libraries. + +# Check POSIX conformance level. +_want_posix_level=200112L +_posix_level_human=POSIX.1-2001 +AC_MSG_CHECKING([if the POSIX conformance level can be set to ${_posix_level_human}]) +AC_COMPILE_IFELSE([AC_LANG_SOURCE([ +#define _POSIX_C_SOURCE ${_want_posix_level} +#include <unistd.h> +#if _POSIX_VERSION != ${_want_posix_level} +#error incorrect _POSIX_VERSION +#endif +])], +[AC_MSG_RESULT([yes])], +[AC_MSG_RESULT([no]); + AC_MSG_FAILURE([this system does not conform to the ${_posix_level_human} standard]) +]) +AC_DEFINE_UNQUOTED([_POSIX_C_SOURCE], [${_want_posix_level}], [define the POSIX conformance level]) +CFLAGS=${CFLAGS-}${CFLAGS:+ }-D_POSIX_C_SOURCE=${_want_posix_level} + +# Define X/Open conformance level. +_want_xopen_level=500 +AC_DEFINE_UNQUOTED([_XOPEN_SOURCE], [${_want_xopen_level}], [define the X/Open conformance level]) +CFLAGS=${CFLAGS-}${CFLAGS:+ }-D_XOPEN_SOURCE=${_want_xopen_level} + +# Checks for header files. +AC_HEADER_STDC +AC_HEADER_STDBOOL +AC_HEADER_STAT + +AC_CHECK_HEADERS_ONCE([stdarg.h]) +AC_CHECK_HEADERS_ONCE([linux/limits.h]) + +# Checks for typedefs, structures, and compiler characteristics. +AC_C_CONST +AC_C_INLINE +AC_C_RESTRICT +AC_C_STRINGIZE +AC_C_VARARRAYS +AC_TYPE_SIZE_T +AC_TYPE_UINT8_T + +if test x"$ac_cv_c_vararrays" != x'yes' +then + AC_MSG_ERROR([$CC does not support variable-length arrays (VLAs)]) +fi + +# Checks for library functions. + +AC_CHECK_FUNCS_ONCE([getenv getpwuid stat]) +AC_CHECK_FUNCS_ONCE([strdup strncpy strncat]) + +AC_CHECK_FUNCS_ONCE([mktemp mkdtemp tempnam]) +AC_CHECK_DECLS([mkdtemp, mktemp], [], [], [[#include <stdlib.h>]]) +AC_CHECK_DECLS([tempnam], [], [], [[#include <stdio.h>]]) + # Checks for compiler options. _cccheckingopts=$( # clang (newer versions) don't fail if they see an unknown argument. @@ -129,62 +185,6 @@ AC_DEFINE_UNQUOTED([SK_WARN_UNUSED_RESULT], [${_sk_warn_unused_result:-/* warn_u AC_DEFINE_UNQUOTED([HAVE_CC_NONNULL_CHECK], $((_sk_cc_nonnull_check)), [Define to 1 if the CC supports __attribute__(nonnull)]) -# Checks for libraries. - -# Check POSIX conformance level. -_want_posix_level=200112L -_posix_level_human=POSIX.1-2001 -AC_MSG_CHECKING([if the POSIX conformance level can be set to ${_posix_level_human}]) -AC_COMPILE_IFELSE([AC_LANG_SOURCE([ -#define _POSIX_C_SOURCE ${_want_posix_level} -#include <unistd.h> -#if _POSIX_VERSION != ${_want_posix_level} -#error incorrect _POSIX_VERSION -#endif -])], -[AC_MSG_RESULT([yes])], -[AC_MSG_RESULT([no]); - AC_MSG_FAILURE([this system does not conform to the ${_posix_level_human} standard]) -]) -AC_DEFINE_UNQUOTED([_POSIX_C_SOURCE], [${_want_posix_level}], [define the POSIX conformance level]) -CFLAGS=${CFLAGS-}${CFLAGS:+ }-D_POSIX_C_SOURCE=${_want_posix_level} - -# Define X/Open conformance level. -_want_xopen_level=500 -AC_DEFINE_UNQUOTED([_XOPEN_SOURCE], [${_want_xopen_level}], [define the X/Open conformance level]) -CFLAGS=${CFLAGS-}${CFLAGS:+ }-D_XOPEN_SOURCE=${_want_xopen_level} - -# Checks for header files. -AC_HEADER_STDC -AC_HEADER_STDBOOL -AC_HEADER_STAT - -AC_CHECK_HEADERS_ONCE([stdarg.h]) -AC_CHECK_HEADERS_ONCE([linux/limits.h]) - -# Checks for typedefs, structures, and compiler characteristics. -AC_C_CONST -AC_C_INLINE -AC_C_RESTRICT -AC_C_STRINGIZE -AC_C_VARARRAYS -AC_TYPE_SIZE_T -AC_TYPE_UINT8_T - -if test x"$ac_cv_c_vararrays" != x'yes' -then - AC_MSG_ERROR([$CC does not support variable-length arrays (VLAs)]) -fi - -# Checks for library functions. - -AC_CHECK_FUNCS_ONCE([getenv getpwuid stat]) -AC_CHECK_FUNCS_ONCE([strdup strncpy strncat]) - -AC_CHECK_FUNCS_ONCE([mktemp mkdtemp tempnam]) -AC_CHECK_DECLS([mkdtemp, mktemp], [], [], [[#include <stdlib.h>]]) -AC_CHECK_DECLS([tempnam], [], [], [[#include <stdio.h>]]) - # Add debug support AC_ARG_ENABLE( [debug], |