323d555c82
The callers of this macro generally do not supply this information. Without it, the checks rely on compiler support for implicit function declarations. It would be possible to supply this information in the callers. But even then, with the existing macro interface, it would be necessary to pass eg. null pointers where they trigger undefined behavior. Therefore, use the same kludge that autoconf uses to make up prototypes, avoiding those implicit function declarations. The includes/arguments macro parameters are now ignored, but preserved for interface compatibility.
63 lines
1.3 KiB
Plaintext
63 lines
1.3 KiB
Plaintext
dnl $Id$
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dnl
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dnl
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dnl Look for function in any of the specified libraries
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dnl
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dnl AC_FIND_FUNC_NO_LIBS2(func, libraries, includes, arguments, extra libs, extra args)
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AC_DEFUN([AC_FIND_FUNC_NO_LIBS2], [
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AC_MSG_CHECKING([for $1])
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AC_CACHE_VAL(ac_cv_funclib_$1,
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[
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if eval "test \"\$ac_cv_func_$1\" != yes" ; then
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ac_save_LIBS="$LIBS"
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for ac_lib in $2; do
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case "$ac_lib" in
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"") ;;
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yes) ac_lib="" ;;
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no) continue ;;
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-l*) ;;
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*) ac_lib="-l$ac_lib" ;;
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esac
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LIBS="$6 $ac_lib $5 $ac_save_LIBS"
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[char $1 (void);]],[[$1()]])],[eval "if test -n \"$ac_lib\";then ac_cv_funclib_$1=$ac_lib; else ac_cv_funclib_$1=yes; fi";break])
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done
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eval "ac_cv_funclib_$1=\${ac_cv_funclib_$1-no}"
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LIBS="$ac_save_LIBS"
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fi
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])
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eval "ac_res=\$ac_cv_funclib_$1"
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if false; then
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AC_CHECK_FUNCS($1)
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dnl AC_CHECK_LIBS($2, foo)
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fi
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# $1
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eval "ac_tr_func=HAVE_[]upcase($1)"
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eval "ac_tr_lib=HAVE_LIB[]upcase($ac_res | sed -e 's/-l//')"
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eval "LIB_$1=$ac_res"
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case "$ac_res" in
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yes)
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eval "ac_cv_func_$1=yes"
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eval "LIB_$1="
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AC_DEFINE_UNQUOTED($ac_tr_func)
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AC_MSG_RESULT([yes])
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;;
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no)
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eval "ac_cv_func_$1=no"
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eval "LIB_$1="
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AC_MSG_RESULT([no])
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;;
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*)
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eval "ac_cv_func_$1=yes"
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AC_DEFINE_UNQUOTED($ac_tr_func)
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AC_DEFINE_UNQUOTED($ac_tr_lib)
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AC_MSG_RESULT([yes, in $ac_res])
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;;
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esac
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AC_SUBST(LIB_$1)
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])
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