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Wed Mar 20 09:37:31 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>

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* acgeneral.m4 (AC_CHECK_LIB): Omit `char $2' decl when $2 is `main'.
This commit is contained in:
Roland McGrath 1996-03-20 15:08:48 +00:00
parent b0a426ade5
commit 1207bb2529
2 changed files with 22 additions and 10 deletions
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16
acgeneral.m4
View File

@ -1408,17 +1408,21 @@ dnl Use a cache variable name containing both the library and function name,
dnl because the test really is for library $1 defining function $2, not
dnl just for library $1. Separate tests with the same $1 and different $2s
dnl may have different results.
ac_lib_var=`echo $1['_']$2 | tr '.-/+' '___p'`
ac_lib_var=`echo $1['_']$2 | tr '.\055/+' '___p'`
AC_CACHE_VAL(ac_cv_lib_$ac_lib_var,
[ac_save_LIBS="$LIBS"
LIBS="-l$1 $5 $LIBS"
AC_TRY_LINK([/* Override any gcc2 internal prototype to avoid an error. */
AC_TRY_LINK(dnl
ifelse([$2], [main], , dnl Avoid conflicting decl of main.
[/* Override any gcc2 internal prototype to avoid an error. */
]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
extern "C"
#endif
])dnl
[char $2();
],
[/* We use `char' because `int' might match the return type of a gcc2
builtin and then its argument prototype would still apply. */
char $2();
]),
[$2()],
eval "ac_cv_lib_$ac_lib_var=yes",
eval "ac_cv_lib_$ac_lib_var=no")dnl
@ -1685,7 +1689,9 @@ dnl select. Similarly for bzero.
extern "C"
#endif
])dnl
[char $1();
[/* We use `char' because `int' might match the return type of a gcc2
builtin and then its argument prototype would still apply. */
char $1();
], [
/* The GNU C library defines this for functions which it implements
to always fail with ENOSYS. Some functions are actually named

16
lib/autoconf/general.m4
View File

@ -1408,17 +1408,21 @@ dnl Use a cache variable name containing both the library and function name,
dnl because the test really is for library $1 defining function $2, not
dnl just for library $1. Separate tests with the same $1 and different $2s
dnl may have different results.
ac_lib_var=`echo $1['_']$2 | tr '.-/+' '___p'`
ac_lib_var=`echo $1['_']$2 | tr '.\055/+' '___p'`
AC_CACHE_VAL(ac_cv_lib_$ac_lib_var,
[ac_save_LIBS="$LIBS"
LIBS="-l$1 $5 $LIBS"
AC_TRY_LINK([/* Override any gcc2 internal prototype to avoid an error. */
AC_TRY_LINK(dnl
ifelse([$2], [main], , dnl Avoid conflicting decl of main.
[/* Override any gcc2 internal prototype to avoid an error. */
]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
extern "C"
#endif
])dnl
[char $2();
],
[/* We use `char' because `int' might match the return type of a gcc2
builtin and then its argument prototype would still apply. */
char $2();
]),
[$2()],
eval "ac_cv_lib_$ac_lib_var=yes",
eval "ac_cv_lib_$ac_lib_var=no")dnl
@ -1685,7 +1689,9 @@ dnl select. Similarly for bzero.
extern "C"
#endif
])dnl
[char $1();
[/* We use `char' because `int' might match the return type of a gcc2
builtin and then its argument prototype would still apply. */
char $1();
], [
/* The GNU C library defines this for functions which it implements
to always fail with ENOSYS. Some functions are actually named