Improve detection of memrchr, strlcat, and strlcpy.

[perl5.git] / Configure

diff --git a/Configure b/Configure
index ad17948..b91d156 100755 (executable)
--- a/Configure
+++ b/Configure
@@ -16177,8 +16177,25 @@ case "$d_memmem_proto" in
 esac
 
 : see if memrchr exists
-set memrchr d_memrchr
-eval $inlibc
+: We need both a prototype in string.h and the symbol in libc.
+echo " "
+d_memrchr_proto=''
+xx1="#$d_gnulibc HAS_GNULIBC"
+xx2='#if defined(HAS_GNULIBC) && !defined(_GNU_SOURCE)'
+xx3='#   define _GNU_SOURCE'
+xx4='#endif'
+set d_memrchr_proto memrchr literal "$xx1" literal "$xx2" literal "$xx3" literal "$xx4" define string.h
+eval $hasproto
+case "$d_memrchr_proto" in
+    define) # see if memrchr exists
+       set memrchr d_memrchr
+       eval $inlibc
+       ;;
+    *)  val=$undef
+       set d_memrchr
+       eval $setvar
+       ;;
+esac
 
 : see if mkdir exists
 set mkdir d_mkdir
@@ -18787,12 +18804,46 @@ set strftime d_strftime
 eval $inlibc
 
 : see if strlcat exists
-set strlcat d_strlcat
-eval $inlibc
+: We need both a prototype in string.h and the symbol in libc.
+echo " "
+d_strlcat_proto=''
+xx1="#$d_gnulibc HAS_GNULIBC"
+xx2='#if defined(HAS_GNULIBC) && !defined(_GNU_SOURCE)'
+xx3='#   define _GNU_SOURCE'
+xx4='#endif'
+set d_strlcat_proto strlcat literal "$xx1" literal "$xx2" literal "$xx3" literal "$xx4" define string.h
+eval $hasproto
+case "$d_strlcat_proto" in
+    define) # see if strlcat exists
+       set strlcat d_strlcat
+       eval $inlibc
+       ;;
+    *)  val=$undef
+       set d_strlcat
+       eval $setvar
+       ;;
+esac
 
 : see if strlcpy exists
-set strlcpy d_strlcpy
-eval $inlibc
+: We need both a prototype in string.h and the symbol in libc.
+echo " "
+d_strlcpy_proto=''
+xx1="#$d_gnulibc HAS_GNULIBC"
+xx2='#if defined(HAS_GNULIBC) && !defined(_GNU_SOURCE)'
+xx3='#   define _GNU_SOURCE'
+xx4='#endif'
+set d_strlcpy_proto strlcpy literal "$xx1" literal "$xx2" literal "$xx3" literal "$xx4" define string.h
+eval $hasproto
+case "$d_strlcpy_proto" in
+    define) # see if strlcpy exists
+       set strlcpy d_strlcpy
+       eval $inlibc
+       ;;
+    *)  val=$undef
+       set d_strlcpy
+       eval $setvar
+       ;;
+esac
 
 : see if strnlen exists
 set strnlen d_strnlen