diff options
Diffstat (limited to 'm4/dpkg-compiler.m4')
| -rw-r--r-- | m4/dpkg-compiler.m4 | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/m4/dpkg-compiler.m4 b/m4/dpkg-compiler.m4 index 756af26..cb1063d 100644 --- a/m4/dpkg-compiler.m4 +++ b/m4/dpkg-compiler.m4 @@ -211,7 +211,7 @@ AC_DEFUN([DPKG_COMPILER_OPTIMIZATIONS], [ ]) # DPKG_TRY_C99([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) -# ------------------------------------------------------ +# ------------ # Try compiling some C99 code to see whether it works AC_DEFUN([DPKG_TRY_C99], [ AC_COMPILE_IFELSE([ @@ -253,6 +253,10 @@ AC_DEFUN([DPKG_TRY_C99], [ /* Magic __func__ variable. */ printf("%s", __func__); + +#if __STDC_VERSION__ < 199901L +#error "Requires C99" +#endif ]]) ], [$1], [$2])dnl ])# DPKG_TRY_C99 @@ -261,11 +265,11 @@ AC_DEFUN([DPKG_TRY_C99], [ # ---------- # Check whether the compiler can do C99 AC_DEFUN([DPKG_C_C99], [ - AC_CACHE_CHECK([whether $CC supports C99 features], [dpkg_cv_c99], [ + AC_CACHE_CHECK([whether $CC supports C99], [dpkg_cv_c99], [ DPKG_TRY_C99([dpkg_cv_c99=yes], [dpkg_cv_c99=no]) ]) AS_IF([test "x$dpkg_cv_c99" != "xyes"], [ - AC_CACHE_CHECK([for $CC option to accept C99 features], [dpkg_cv_c99_arg], [ + AC_CACHE_CHECK([for $CC option to accept C99], [dpkg_cv_c99_arg], [ dpkg_cv_c99_arg=none dpkg_save_CC="$CC" for arg in "-std=gnu99" "-std=c99" "-c99" "-AC99" "-xc99=all" \ @@ -282,13 +286,11 @@ AC_DEFUN([DPKG_C_C99], [ ]) AS_IF([test "x$dpkg_cv_c99_arg" != "xnone"], [ CC="$CC $dpkg_cv_c99_arg" - dpkg_cv_c99=1 + dpkg_cv_c99=yes ]) ]) - AS_IF([test "x$dpkg_cv_c99" = "xyes"], [ - AC_DEFINE([HAVE_C99], 1, [Define to 1 if the compiler supports C99.]) - ], [ - AC_MSG_ERROR([unsupported required C99 extensions]) + AS_IF([test "x$dpkg_cv_c99" != "xyes"], [ + AC_MSG_ERROR([unsupported required C99]) ]) ])# DPKG_C_C99 @@ -302,6 +304,10 @@ AC_DEFUN([DPKG_TRY_CXX11], [ ]], [[ // Null pointer keyword. void *ptr = nullptr; + +#if __cplusplus < 201103L +#error "Requires C++11" +#endif ]]) ], [$1], [$2]) AC_LANG_POP([C++])dnl @@ -333,7 +339,4 @@ AC_DEFUN([DPKG_CXX_CXX11], [ dpkg_cv_cxx11=yes ]) ]) - AS_IF([test "x$dpkg_cv_cxx11" = "xyes"], [ - AC_DEFINE([HAVE_CXX11], 1, [Define to 1 if the compiler supports C++11.]) - ])[]dnl ])# DPKG_CXX_CXX11 |