Make it possible to give --libdir an absolute path

With this, we introduce the make variable 'libdir', which differs from
'LIBDIR' not only in casing, but also by being the absolute path to
the library installation directory.  This variable is intentionally
compatible with the GNU coding standards.

When --libdir is given an absolute path, it is considered as a value
according to GNU coding standards, and the variables LIBDIR and libdir
will be this:

    LIBDIR=
    libdir=/absolute/path

When --libdir is given a relative path (just the name of the desired
library directory), or not given at all, it is considered as a
"traditional" OpenSSL value, and the variables LIBDIR and libdir will
be this:

    LIBDIR=relativepath
    libdir=$(INSTALLTOP)/$(LIBDIR)

Fixes #5398
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5446)

Configurations/unix-Makefile.tmpl

@@ -154,21 +154,26 @@ OPENSSLDIR={- #
                            : catdir($prefix, $config{openssldir}))
                       : catdir($prefix, "ssl");
               $openssldir -}
-LIBDIR={- #
-          # if $prefix/lib$target{multilib} is not an existing
-          # directory, then assume that it's not searched by linker
-          # automatically, in which case adding $target{multilib} suffix
-          # causes more grief than we're ready to tolerate, so don't...
-          our $multilib =
-              -d "$prefix/lib$target{multilib}" ? $target{multilib} : "";
-          our $libdir = $config{libdir} || "lib$multilib";
-          $libdir -}
-ENGINESDIR={- use File::Spec::Functions;
-              catdir($prefix,$libdir,"engines-$sover_dirname") -}
+LIBDIR={- our $libdir = $config{libdir};
+          unless ($libdir) {
+              #
+              # if $prefix/lib$target{multilib} is not an existing
+              # directory, then assume that it's not searched by linker
+              # automatically, in which case adding $target{multilib} suffix
+              # causes more grief than we're ready to tolerate, so don't...
+              our $multilib =
+                  -d "$prefix/lib$target{multilib}" ? $target{multilib} : "";
+              $libdir = "lib$multilib";
+          }
+          file_name_is_absolute($libdir) ? "" : $libdir -}
+# $(libdir) is chosen to be compatible with the GNU coding standards
+libdir={- file_name_is_absolute($libdir)
+          ? $libdir : '$(INSTALLTOP)/$(LIBDIR)' -}
+ENGINESDIR=$(libdir)/engines-{- $sover_dirname -}
 
 # Convenience variable for those who want to set the rpath in shared
 # libraries and applications
-LIBRPATH=$(INSTALLTOP)/$(LIBDIR)
+LIBRPATH=$(libdir)
 
 MANDIR=$(INSTALLTOP)/share/man
 DOCDIR=$(INSTALLTOP)/share/doc/$(BASENAME)
@@ -409,15 +414,15 @@ install_dev:
 		cp $$i $(DESTDIR)$(INSTALLTOP)/include/openssl/$$fn; \
 		chmod 644 $(DESTDIR)$(INSTALLTOP)/include/openssl/$$fn; \
 	done
-	@$(PERL) $(SRCDIR)/util/mkdir-p.pl $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)
+	@$(PERL) $(SRCDIR)/util/mkdir-p.pl $(DESTDIR)$(libdir)
 	@set -e; for l in $(INSTALL_LIBS); do \
 		fn=`basename $$l`; \
-		$(ECHO) "install $$l -> $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn"; \
-		cp $$l $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn.new; \
-		$(RANLIB) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn.new; \
-		chmod 644 $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn.new; \
-		mv -f $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn.new \
-		      $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn; \
+		$(ECHO) "install $$l -> $(DESTDIR)$(libdir)/$$fn"; \
+		cp $$l $(DESTDIR)$(libdir)/$$fn.new; \
+		$(RANLIB) $(DESTDIR)$(libdir)/$$fn.new; \
+		chmod 644 $(DESTDIR)$(libdir)/$$fn.new; \
+		mv -f $(DESTDIR)$(libdir)/$$fn.new \
+		      $(DESTDIR)$(libdir)/$$fn; \
 	done
 	@ : {- output_off() if $disabled{shared}; "" -}
 	@set -e; for s in $(INSTALL_SHLIB_INFO); do \
@@ -426,34 +431,34 @@ install_dev:
 		fn1=`basename $$s1`; \
 		fn2=`basename $$s2`; \
 		: {- output_off() if windowsdll(); "" -}; \
-		$(ECHO) "install $$s1 -> $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn1"; \
-		cp $$s1 $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn1.new; \
-		chmod 755 $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn1.new; \
-		mv -f $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn1.new \
-		      $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn1; \
+		$(ECHO) "install $$s1 -> $(DESTDIR)$(libdir)/$$fn1"; \
+		cp $$s1 $(DESTDIR)$(libdir)/$$fn1.new; \
+		chmod 755 $(DESTDIR)$(libdir)/$$fn1.new; \
+		mv -f $(DESTDIR)$(libdir)/$$fn1.new \
+		      $(DESTDIR)$(libdir)/$$fn1; \
 		if [ "$$fn1" != "$$fn2" ]; then \
-			$(ECHO) "link $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn2 -> $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn1"; \
-			ln -sf $$fn1 $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn2; \
+			$(ECHO) "link $(DESTDIR)$(libdir)/$$fn2 -> $(DESTDIR)$(libdir)/$$fn1"; \
+			ln -sf $$fn1 $(DESTDIR)$(libdir)/$$fn2; \
 		fi; \
 		: {- output_on() if windowsdll(); "" -}{- output_off() unless windowsdll(); "" -}; \
-		$(ECHO) "install $$s2 -> $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn2"; \
-		cp $$s2 $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn2.new; \
-		chmod 755 $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn2.new; \
-		mv -f $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn2.new \
-		      $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn2; \
+		$(ECHO) "install $$s2 -> $(DESTDIR)$(libdir)/$$fn2"; \
+		cp $$s2 $(DESTDIR)$(libdir)/$$fn2.new; \
+		chmod 755 $(DESTDIR)$(libdir)/$$fn2.new; \
+		mv -f $(DESTDIR)$(libdir)/$$fn2.new \
+		      $(DESTDIR)$(libdir)/$$fn2; \
 		: {- output_on() unless windowsdll(); "" -}; \
 	done
 	@ : {- output_on() if $disabled{shared}; "" -}
-	@$(PERL) $(SRCDIR)/util/mkdir-p.pl $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig
-	@$(ECHO) "install libcrypto.pc -> $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig/libcrypto.pc"
-	@cp libcrypto.pc $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig
-	@chmod 644 $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig/libcrypto.pc
-	@$(ECHO) "install libssl.pc -> $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig/libssl.pc"
-	@cp libssl.pc $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig
-	@chmod 644 $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig/libssl.pc
-	@$(ECHO) "install openssl.pc -> $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig/openssl.pc"
-	@cp openssl.pc $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig
-	@chmod 644 $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig/openssl.pc
+	@$(PERL) $(SRCDIR)/util/mkdir-p.pl $(DESTDIR)$(libdir)/pkgconfig
+	@$(ECHO) "install libcrypto.pc -> $(DESTDIR)$(libdir)/pkgconfig/libcrypto.pc"
+	@cp libcrypto.pc $(DESTDIR)$(libdir)/pkgconfig
+	@chmod 644 $(DESTDIR)$(libdir)/pkgconfig/libcrypto.pc
+	@$(ECHO) "install libssl.pc -> $(DESTDIR)$(libdir)/pkgconfig/libssl.pc"
+	@cp libssl.pc $(DESTDIR)$(libdir)/pkgconfig
+	@chmod 644 $(DESTDIR)$(libdir)/pkgconfig/libssl.pc
+	@$(ECHO) "install openssl.pc -> $(DESTDIR)$(libdir)/pkgconfig/openssl.pc"
+	@cp openssl.pc $(DESTDIR)$(libdir)/pkgconfig
+	@chmod 644 $(DESTDIR)$(libdir)/pkgconfig/openssl.pc
 
 uninstall_dev:
 	@$(ECHO) "*** Uninstalling development files"
@@ -471,8 +476,8 @@ uninstall_dev:
 	-$(RMDIR) $(DESTDIR)$(INSTALLTOP)/include
 	@set -e; for l in $(INSTALL_LIBS); do \
 		fn=`basename $$l`; \
-		$(ECHO) "$(RM) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn"; \
-		$(RM) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn; \
+		$(ECHO) "$(RM) $(DESTDIR)$(libdir)/$$fn"; \
+		$(RM) $(DESTDIR)$(libdir)/$$fn; \
 	done
 	@ : {- output_off() if $disabled{shared}; "" -}
 	@set -e; for s in $(INSTALL_SHLIB_INFO); do \
@@ -481,23 +486,23 @@ uninstall_dev:
 		fn1=`basename $$s1`; \
 		fn2=`basename $$s2`; \
 		: {- output_off() if windowsdll(); "" -}; \
-		$(ECHO) "$(RM) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn1"; \
-		$(RM) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn1; \
+		$(ECHO) "$(RM) $(DESTDIR)$(libdir)/$$fn1"; \
+		$(RM) $(DESTDIR)$(libdir)/$$fn1; \
 		if [ "$$fn1" != "$$fn2" ]; then \
-			$(ECHO) "$(RM) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn2"; \
-			$(RM) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn2; \
+			$(ECHO) "$(RM) $(DESTDIR)$(libdir)/$$fn2"; \
+			$(RM) $(DESTDIR)$(libdir)/$$fn2; \
 		fi; \
 		: {- output_on() if windowsdll(); "" -}{- output_off() unless windowsdll(); "" -}; \
-		$(ECHO) "$(RM) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn2"; \
-		$(RM) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn2; \
+		$(ECHO) "$(RM) $(DESTDIR)$(libdir)/$$fn2"; \
+		$(RM) $(DESTDIR)$(libdir)/$$fn2; \
 		: {- output_on() unless windowsdll(); "" -}; \
 	done
 	@ : {- output_on() if $disabled{shared}; "" -}
-	$(RM) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig/libcrypto.pc
-	$(RM) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig/libssl.pc
-	$(RM) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig/openssl.pc
-	-$(RMDIR) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/pkgconfig
-	-$(RMDIR) $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)
+	$(RM) $(DESTDIR)$(libdir)/pkgconfig/libcrypto.pc
+	$(RM) $(DESTDIR)$(libdir)/pkgconfig/libssl.pc
+	$(RM) $(DESTDIR)$(libdir)/pkgconfig/openssl.pc
+	-$(RMDIR) $(DESTDIR)$(libdir)/pkgconfig
+	-$(RMDIR) $(DESTDIR)$(libdir)
 
 install_engines:
 	@[ -n "$(INSTALLTOP)" ] || (echo INSTALLTOP should not be empty; exit 1)
@@ -530,7 +535,7 @@ install_runtime:
 	@[ -n "$(INSTALLTOP)" ] || (echo INSTALLTOP should not be empty; exit 1)
 	@$(PERL) $(SRCDIR)/util/mkdir-p.pl $(DESTDIR)$(INSTALLTOP)/bin
 	@ : {- output_off() if windowsdll(); "" -}
-	@$(PERL) $(SRCDIR)/util/mkdir-p.pl $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)
+	@$(PERL) $(SRCDIR)/util/mkdir-p.pl $(DESTDIR)$(libdir)
 	@ : {- output_on() if windowsdll(); "" -}
 	@$(ECHO) "*** Installing runtime files"
 	@set -e; for s in dummy $(INSTALL_SHLIBS); do \
@@ -543,11 +548,11 @@ install_runtime:
 		mv -f $(DESTDIR)$(INSTALLTOP)/bin/$$fn.new \
 		      $(DESTDIR)$(INSTALLTOP)/bin/$$fn; \
 		: {- output_on() unless windowsdll(); "" -}{- output_off() if windowsdll(); "" -}; \
-		$(ECHO) "install $$s -> $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn"; \
-		cp $$s $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn.new; \
-		chmod 755 $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn.new; \
-		mv -f $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn.new \
-		      $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/$$fn; \
+		$(ECHO) "install $$s -> $(DESTDIR)$(libdir)/$$fn"; \
+		cp $$s $(DESTDIR)$(libdir)/$$fn.new; \
+		chmod 755 $(DESTDIR)$(libdir)/$$fn.new; \
+		mv -f $(DESTDIR)$(libdir)/$$fn.new \
+		      $(DESTDIR)$(libdir)/$$fn; \
 		: {- output_on() if windowsdll(); "" -}; \
 	done
 	@set -e; for x in dummy $(INSTALL_PROGRAMS); do \
@@ -750,7 +755,11 @@ libcrypto.pc libssl.pc openssl.pc: configdata.pm $(LIBS) {- join(" ",map { shlib
 libcrypto.pc:
 	@ ( echo 'prefix=$(INSTALLTOP)'; \
 	    echo 'exec_prefix=$${prefix}'; \
-	    echo 'libdir=$${exec_prefix}/$(LIBDIR)'; \
+	    if [ -n "$(LIBDIR)" ]; then \
+	        echo 'libdir=$${exec_prefix}/$(LIBDIR)'; \
+	    else \
+	        echo 'libdir=$(libdir)'; \
+	    fi; \
 	    echo 'includedir=$${prefix}/include'; \
 	    echo 'enginesdir=$${libdir}/engines-{- $sover_dirname -}'; \
 	    echo ''; \
@@ -764,7 +773,11 @@ libcrypto.pc:
 libssl.pc:
 	@ ( echo 'prefix=$(INSTALLTOP)'; \
 	    echo 'exec_prefix=$${prefix}'; \
-	    echo 'libdir=$${exec_prefix}/$(LIBDIR)'; \
+	    if [ -n "$(LIBDIR)" ]; then \
+	        echo 'libdir=$${exec_prefix}/$(LIBDIR)'; \
+	    else \
+	        echo 'libdir=$(libdir)'; \
+	    fi; \
 	    echo 'includedir=$${prefix}/include'; \
 	    echo ''; \
 	    echo 'Name: OpenSSL-libssl'; \
@@ -777,7 +790,11 @@ libssl.pc:
 openssl.pc:
 	@ ( echo 'prefix=$(INSTALLTOP)'; \
 	    echo 'exec_prefix=$${prefix}'; \
-	    echo 'libdir=$${exec_prefix}/$(LIBDIR)'; \
+	    if [ -n "$(LIBDIR)" ]; then \
+	        echo 'libdir=$${exec_prefix}/$(LIBDIR)'; \
+	    else \
+	        echo 'libdir=$(libdir)'; \
+	    fi; \
 	    echo 'includedir=$${prefix}/include'; \
 	    echo ''; \
 	    echo 'Name: OpenSSL'; \

Configurations/windows-makefile.tmpl

@@ -142,7 +142,7 @@ OPENSSLDIR_dev={- #
                   $openssldir_dev -}
 OPENSSLDIR_dir={- canonpath($openssldir_dir) -}
 LIBDIR={- our $libdir = $config{libdir} || "lib";
-          $libdir -}
+          file_name_is_absolute($libdir) ? "" : $libdir -}
 ENGINESDIR_dev={- use File::Spec::Functions qw(:DEFAULT splitpath);
                   our $enginesdir = catdir($prefix,$libdir,"engines-$sover_dirname");
                   our ($enginesdir_dev, $enginesdir_dir, $enginesdir_file) =
@@ -159,6 +159,10 @@ OPENSSLDIR=$(OPENSSLDIR_dev)$(OPENSSLDIR_dir)
 ENGINESDIR=$(ENGINESDIR_dev)$(ENGINESDIR_dir)
 !ENDIF
 
+# $(libdir) is chosen to be compatible with the GNU coding standards
+libdir={- file_name_is_absolute($libdir)
+          ? $libdir : '$(INSTALLTOP)\$(LIBDIR)' -}
+
 CC={- $config{cc} -}
 CPP={- $config{cpp} -}
 CPPFLAGS={- our $cppflags = join(" ",
@@ -324,12 +328,10 @@ install_dev:
 				       "$(INSTALLTOP)\include\openssl"
 	@"$(PERL)" "$(SRCDIR)\util\copy.pl" $(BLDDIR)\include\openssl\*.h \
 				       "$(INSTALLTOP)\include\openssl"
-	@"$(PERL)" "$(SRCDIR)\util\mkdir-p.pl" "$(INSTALLTOP)\$(LIBDIR)"
-	@"$(PERL)" "$(SRCDIR)\util\copy.pl" $(INSTALL_LIBS) \
-				       "$(INSTALLTOP)\$(LIBDIR)"
+	@"$(PERL)" "$(SRCDIR)\util\mkdir-p.pl" "$(libdir)"
+	@"$(PERL)" "$(SRCDIR)\util\copy.pl" $(INSTALL_LIBS) "$(libdir)"
 	@if "$(SHLIBS)"=="" \
-	 "$(PERL)" "$(SRCDIR)\util\copy.pl" ossl_static.pdb \
-                                       "$(INSTALLTOP)\$(LIBDIR)"
+	 "$(PERL)" "$(SRCDIR)\util\copy.pl" ossl_static.pdb "$(libdir)"
 
 uninstall_dev: