Proper support for shared build under MacOS X.

Configure

diff --git a/Configure b/Configure
index 295a3c3..ab192f0 100755
--- a/Configure
+++ b/Configure
@@ -510,8 +510,8 @@
 
 ##### MacOS X (a.k.a. Rhapsody or Darwin) setup
 "rhapsody-ppc-cc","cc:-O3 -DB_ENDIAN::(unknown):MACOSX_RHAPSODY::BN_LLONG RC4_CHAR RC4_CHUNK DES_UNROLL BF_PTR:${no_asm}::",
-"darwin-ppc-cc","cc:-O3 -DB_ENDIAN::-D_REENTRANT:MACOSX:-Wl,-search_paths_first:BN_LLONG RC4_CHAR RC4_CHUNK DES_UNROLL BF_PTR:ppccpuid_osx32.o:osx_ppc32.o osx_ppc32-mont.o:::::sha1-ppc_osx32.o sha256-ppc_osx32.o::::::dlfcn:darwin-shared:-fPIC -fno-common:-dynamiclib:.\$(SHLIB_MAJOR).\$(SHLIB_MINOR).dylib",
-"darwin64-ppc-cc","cc:-m64 -O3 -DB_ENDIAN::-D_REENTRANT:MACOSX:-Wl,-search_paths_first:SIXTY_FOUR_BIT_LONG RC4_CHAR RC4_CHUNK DES_UNROLL BF_PTR:ppccpuid_osx64.o:osx_ppc64.o osx_ppc64-mont.o:::::sha1-ppc_osx64.o sha256-ppc_osx64.o sha512-ppc_osx64.o::::::dlfcn:darwin-shared:-fPIC -fno-common:-m64 -dynamiclib:.\$(SHLIB_MAJOR).\$(SHLIB_MINOR).dylib",
+"darwin-ppc-cc","cc:-O3 -DB_ENDIAN::-D_REENTRANT:MACOSX:-Wl,-search_paths_first%:BN_LLONG RC4_CHAR RC4_CHUNK DES_UNROLL BF_PTR:ppccpuid_osx32.o:osx_ppc32.o osx_ppc32-mont.o:::::sha1-ppc_osx32.o sha256-ppc_osx32.o::::::dlfcn:darwin-shared:-fPIC -fno-common:-dynamiclib:.\$(SHLIB_MAJOR).\$(SHLIB_MINOR).dylib",
+"darwin64-ppc-cc","cc:-m64 -O3 -DB_ENDIAN::-D_REENTRANT:MACOSX:-Wl,-search_paths_first%:SIXTY_FOUR_BIT_LONG RC4_CHAR RC4_CHUNK DES_UNROLL BF_PTR:ppccpuid_osx64.o:osx_ppc64.o osx_ppc64-mont.o:::::sha1-ppc_osx64.o sha256-ppc_osx64.o sha512-ppc_osx64.o::::::dlfcn:darwin-shared:-fPIC -fno-common:-m64 -dynamiclib:.\$(SHLIB_MAJOR).\$(SHLIB_MINOR).dylib",
 "darwin-i386-cc","cc:-O3 -fomit-frame-pointer -DL_ENDIAN::-D_REENTRANT:MACOSX::BN_LLONG RC4_CHAR RC4_CHUNK DES_UNROLL BF_PTR:${no_asm}:dlfcn:darwin-shared:-fPIC -fno-common:-dynamiclib:.\$(SHLIB_MAJOR).\$(SHLIB_MINOR).dylib",
 "debug-darwin-ppc-cc","cc:-DBN_DEBUG -DREF_CHECK -DCONF_DEBUG -DCRYPTO_MDEBUG -DB_ENDIAN -g -Wall -O::-D_REENTRANT:MACOSX::BN_LLONG RC4_CHAR RC4_CHUNK DES_UNROLL BF_PTR::osx_ppc32.o osx_ppc32-mont.o:::::sha1-ppc_osx32.o::::::dlfcn:darwin-shared:-fPIC:-dynamiclib:.\$(SHLIB_MAJOR).\$(SHLIB_MINOR).dylib",
 
@@ -987,6 +987,11 @@
 my $ranlib = $fields[$idx_ranlib];
 my $arflags = $fields[$idx_arflags];
 
+# '%' in $lflags is used to split flags to "pre-" and post-flags
+my ($prelflags,$postlflags)=split('%',$lflags);
+if (defined($postlflags))	{ $lflags=$postlflags;	}
+else				{ $lflags=$prelflags; undef $prelflags;	}
+
 my $no_shared_warn=0;
 my $no_user_cflags=0;
 
@@ -1334,6 +1339,7 @@
 	s/^MAKEDEPPROG=.*$/MAKEDEPPROG= $cc/ if $cc eq "gcc";
 	s/^CFLAG=.*$/CFLAG= $cflags/;
 	s/^DEPFLAG=.*$/DEPFLAG= $depflags/;
+	s/^PEX_LIBS=.*$/PEX_LIBS= $prelflags/;
 	s/^EX_LIBS=.*$/EX_LIBS= $lflags/;
 	s/^EXE_EXT=.*$/EXE_EXT= $exe_ext/;
 	s/^CPUID_OBJ=.*$/CPUID_OBJ= $cpuid_obj/;