New config variable $ignore_versioned_solibs, for Linux.

p4raw-id: //depot/maint-5.004/perl@3247

2 files changed, 27 insertions, 1 deletions

diff --git a/Configure b/Configure
index 595e63822b..fa7de06535 100755
--- a/Configure
+++ b/Configure
@@ -552,6 +552,7 @@ libpth=''
 loclibpth=''
 plibpth=''
 xlibpth=''
+ignore_versioned_solibs=''
 libs=''
 lns=''
 lseektype=''
@@ -731,6 +732,8 @@ groupstype=''
 i_whoami=''
 : default library list
 libswanted=''
+: some systems want only to use the non-versioned libso:s
+ignore_versioned_solibs=''
 : set useposix=false in your hint file to disable the POSIX extension.
 useposix=true
 : set useopcode=false in your hint file to disable the Opcode extension.
@@ -3401,7 +3404,8 @@ case "$libswanted" in
 esac
 for thislib in $libswanted; do
 	
-	if xxx=`./loc lib$thislib.$so.[0-9]'*' X $libpth`; $test -f "$xxx"; then
+	if xxx=`./loc lib$thislib.$so.[0-9]'*' X $libpth`;
+		$test -f "$xxx" -a "X$ignore_versioned_solibs" = "X"; then
 		echo "Found -l$thislib (shared)."
 		case " $dflt " in
 		*"-l$thislib "*);;
@@ -10579,6 +10583,7 @@ i_values='$i_values'
 i_varargs='$i_varargs'
 i_varhdr='$i_varhdr'
 i_vfork='$i_vfork'
+ignore_versioned_solibs='$ignore_versioned_solibs'
 incpath='$incpath'
 inews='$inews'
 installarchlib='$installarchlib'
diff --git a/hints/linux.sh b/hints/linux.sh
index b01f8415dd..7861c12b76 100644
--- a/hints/linux.sh
+++ b/hints/linux.sh
@@ -18,6 +18,27 @@
 # No version of Linux supports setuid scripts.
 d_suidsafe='undef'
 
+# Debian and Red Hat, and perhaps other vendors, provide both runtime and
+# development packages for some libraries.  The runtime packages contain shared
+# libraries with version information in their names (e.g., libgdbm.so.1.7.3);
+# the development packages supplement this with versionless shared libraries
+# (e.g., libgdbm.so).
+#
+# If you want to link against such a library, you must install the development
+# version of the package.
+#
+# These packages use a -dev naming convention in both Debian and Red Hat:
+#   libgdbmg1  (non-development version of GNU libc 2-linked GDBM library)
+#   libgdbmg1-dev (development version of GNU libc 2-linked GDBM library)
+# So make sure that for any libraries you wish to link Perl with under
+# Debian or Red Hat you have the -dev packages installed.
+#
+# Some operating systems (e.g., Solaris 2.6) will link to a versioned shared
+# library implicitly.  For example, on Solaris, `ld foo.o -lgdbm' will find an
+# appropriate version of libgdbm, if one is available; Linux, however, doesn't
+# do the implicit mapping.
+ignore_versioned_solibs='y'
+
 # perl goes into the /usr tree.  See the Filesystem Standard
 # available via anonymous FTP at tsx-11.mit.edu in
 # /pub/linux/docs/linux-standards/fsstnd.