diff options
Diffstat (limited to 'gcc/aclocal.m4')
| -rw-r--r-- | gcc/aclocal.m4 | 45 |
1 files changed, 41 insertions, 4 deletions
diff --git a/gcc/aclocal.m4 b/gcc/aclocal.m4 index 8c8efd84b84..8e169ba5cfb 100644 --- a/gcc/aclocal.m4 +++ b/gcc/aclocal.m4 @@ -1,4 +1,17 @@ -Fdnl See whether we can include both string.h and strings.h. +dnl See if stdbool.h properly defines bool and true/false. +AC_DEFUN(gcc_AC_HEADER_STDBOOL, +[AC_CACHE_CHECK([for working stdbool.h], + ac_cv_header_stdbool_h, +[AC_TRY_COMPILE([#include <stdbool.h>], +[bool foo = false;], +ac_cv_header_stdbool_h=yes, ac_cv_header_stdbool_h=no)]) +if test $ac_cv_header_stdbool_h = yes; then + AC_DEFINE(HAVE_STDBOOL_H, 1, + [Define if you have a working <stdbool.h> header file.]) +fi +]) + +dnl See whether we can include both string.h and strings.h. AC_DEFUN(gcc_AC_HEADER_STRING, [AC_CACHE_CHECK([whether string.h and strings.h may both be included], gcc_cv_header_string, @@ -42,14 +55,23 @@ changequote([, ])dnl gcc_AC_CHECK_DECL($ac_func, [AC_DEFINE_UNQUOTED($ac_tr_decl, 1) $2], [AC_DEFINE_UNQUOTED($ac_tr_decl, 0) $3], +dnl It is possible that the include files passed in here are local headers +dnl which supply a backup declaration for the relevant prototype based on +dnl the definition of (or lack of) the HAVE_DECL_ macro. If so, this test +dnl will always return success. E.g. see libiberty.h's handling of +dnl `basename'. To avoid this, we define the relevant HAVE_DECL_ macro to +dnl 1 so that any local headers used do not provide their own prototype +dnl during this test. +#undef $ac_tr_decl +#define $ac_tr_decl 1 $4 ) done dnl Automatically generate config.h entries via autoheader. if test x = y ; then patsubst(translit([$1], [a-z], [A-Z]), [\w+], - AC_DEFINE([HAVE_DECL_\&], 1, - [Define to 1 if we found this declaration otherwise define to 0.]))dnl + [AC_DEFINE([HAVE_DECL_\&], 1, + [Define to 1 if we found this declaration otherwise define to 0.])])dnl fi ]) @@ -184,7 +206,20 @@ switch (0) case 0: case (sizeof(long double) >= sizeof(double)):;], gcc_cv_c_long_double=yes, gcc_cv_c_long_double=no) fi]) if test $gcc_cv_c_long_double = yes; then - AC_DEFINE(HAVE_LONG_DOUBLE) + AC_DEFINE(HAVE_LONG_DOUBLE, 1, + [Define if your compiler supports the \`long double' type.]) +fi +]) + +dnl Check whether _Bool is built-in. +AC_DEFUN(gcc_AC_C__BOOL, +[AC_CACHE_CHECK(for built-in _Bool, gcc_cv_c__bool, +[AC_TRY_COMPILE(, +[_Bool foo;], +gcc_cv_c__bool=yes, gcc_cv_c__bool=no) +]) +if test $gcc_cv_c__bool = yes; then + AC_DEFINE(HAVE__BOOL, 1, [Define if the \`_Bool' type is built-in.]) fi ]) @@ -1102,7 +1137,9 @@ if test -n "[$]$1"; then [changequote(<<,>>)dnl ac_prog_version=`<<$>>$1 $3 2>&1 | sed -n 's/^.*patsubst(<<$4>>,/,\/).*$/\1/p'` +changequote([,])dnl echo "configure:__oline__: version of $2 is $ac_prog_version" >&AC_FD_CC +changequote(<<,>>)dnl case $ac_prog_version in '') gcc_cv_prog_$2_modern=no;; <<$5>>) |