Add configure options --enable-symlink-build and --enable-symlink-install

These options allow e2fsprogs to be built using symlinks instead of
hard links, and to be installed using symlinks instead of hard links,
respectively.

Addresses-Sourceforge-Bug: #1436294

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

13 files changed, 138 insertions, 71 deletions

diff --git a/MCONFIG.in b/MCONFIG.in
index fba2208a..418a4509 100644
--- a/MCONFIG.in
+++ b/MCONFIG.in
@@ -59,6 +59,8 @@ ALL_LDFLAGS = $(LDFLAGS) @LDFLAG_DYNAMIC@
 LDFLAGS_STATIC = $(LDFLAGS) @LDFLAG_STATIC@
 BUILD_CFLAGS = @BUILD_CFLAGS@
 BUILD_LDFLAGS = @BUILD_LDFLAGS@
+LINK_BUILD_FLAGS = @LINK_BUILD_FLAGS@
+LINK_INSTALL_FLAGS = @LINK_INSTALL_FLAGS@
 RM = @RM@
 LN = @LN@
 LN_S = @LN_S@
@@ -176,7 +178,8 @@ MANMODE=	444
 # Autoconf magic...
 #
 
-DEP_LIB_MAKEFILES = $(top_srcdir)/lib/Makefile.elf-lib  \
+DEP_LIB_MAKEFILES = $(top_srcdir)/lib/Makefile.library \
+	$(top_srcdir)/lib/Makefile.elf-lib  \
 	$(top_srcdir)/lib/Makefile.bsd-lib $(top_srcdir)/lib/Makefile.darwin-lib \
 	$(top_srcdir)/lib/Makefile.solaris-lib $(top_srcdir)/lib/Makefile.checker \
 	$(top_srcdir)/lib/Makefile.profile
diff --git a/configure b/configure
index 12d6a9f4..d563a8de 100755
--- a/configure
+++ b/configure
@@ -700,6 +700,8 @@ ELF_CMT
 HTREE_CMT
 Q
 E
+LINK_BUILD_FLAGS
+LINK_INSTALL_FLAGS
 MAINTAINER_CMT
 LINUX_INCLUDE
 EGREP
@@ -780,6 +782,8 @@ with_ccopts
 with_ldopts
 with_root_prefix
 enable_maintainer_mode
+enable_symlink_install
+enable_symlink_build
 enable_verbose_makecmds
 enable_compression
 enable_htree
@@ -1429,7 +1433,9 @@ Optional Features:
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
   --enable-maintainer-mode enable makefile rules useful for maintainers
-  --enable-verbose-makecmds  enable verbose make command output
+  --enable-symlink-install use symlinks when installing instead of hard links
+  --enable-symlink-build  use symlinks while building instead of hard links
+  --enable-verbose-makecmds enable verbose make command output
   --enable-compression	  enable EXPERIMENTAL compression support
   --enable-htree      	  enable EXPERIMENTAL htree directory support
   --enable-elf-shlibs	  select ELF shared libraries
@@ -4575,6 +4581,48 @@ $as_echo "Disabling maintainer mode by default" >&6; }
 fi
 
 
+# Check whether --enable-symlink-install was given.
+if test "${enable_symlink_install+set}" = set; then :
+  enableval=$enable_symlink_install; if test "$enableval" = "no"
+then
+	LINK_INSTALL_FLAGS=-f
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: Disabling symlinks for install" >&5
+$as_echo "Disabling symlinks for install" >&6; }
+else
+	LINK_INSTALL_FLAGS=-sf
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: Enabling symlinks for install" >&5
+$as_echo "Enabling symlinks for install" >&6; }
+fi
+
+else
+  LINK_INSTALL_FLAGS=-f
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: Disabling symlinks for install" >&5
+$as_echo "Disabling symlinks for install" >&6; }
+
+fi
+
+
+# Check whether --enable-symlink-build was given.
+if test "${enable_symlink_build+set}" = set; then :
+  enableval=$enable_symlink_build; if test "$enableval" = "no"
+then
+	LINK_BUILD_FLAGS=
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: Disabling symlinks for build" >&5
+$as_echo "Disabling symlinks for build" >&6; }
+else
+	LINK_BUILD_FLAGS=-s
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: Enabling symlinks for build" >&5
+$as_echo "Enabling symlinks for build" >&6; }
+fi
+
+else
+  LINK_BUILD_FLAGS=
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: Disabling symlinks for build" >&5
+$as_echo "Disabling symlinks for build" >&6; }
+
+fi
+
+
 # Check whether --enable-verbose-makecmds was given.
 if test "${enable_verbose_makecmds+set}" = set; then :
   enableval=$enable_verbose_makecmds; if test "$enableval" = "no"
diff --git a/configure.in b/configure.in
index 5077a97b..3441bee6 100644
--- a/configure.in
+++ b/configure.in
@@ -154,10 +154,46 @@ AC_MSG_RESULT([Disabling maintainer mode by default])
 )
 AC_SUBST(MAINTAINER_CMT)
 dnl
+dnl handle --enable-symlink-install
+dnl
+AC_ARG_ENABLE([symlink-install],
+[  --enable-symlink-install use symlinks when installing instead of hard links],
+if test "$enableval" = "no"
+then
+	LINK_INSTALL_FLAGS=-f
+	AC_MSG_RESULT([Disabling symlinks for install])
+else
+	LINK_INSTALL_FLAGS=-sf
+	AC_MSG_RESULT([Enabling symlinks for install])
+fi
+,
+LINK_INSTALL_FLAGS=-f
+AC_MSG_RESULT([Disabling symlinks for install])
+)
+AC_SUBST(LINK_INSTALL_FLAGS)
+dnl
+dnl handle --enable-symlink-build
+dnl
+AC_ARG_ENABLE([symlink-build],
+[  --enable-symlink-build  use symlinks while building instead of hard links],
+if test "$enableval" = "no"
+then
+	LINK_BUILD_FLAGS=
+	AC_MSG_RESULT([Disabling symlinks for build])
+else
+	LINK_BUILD_FLAGS=-s
+	AC_MSG_RESULT([Enabling symlinks for build])
+fi
+,
+LINK_BUILD_FLAGS=
+AC_MSG_RESULT([Disabling symlinks for build])
+)
+AC_SUBST(LINK_BUILD_FLAGS)
+dnl
 dnl handle --enable-verbose-makecmds
 dnl
 AC_ARG_ENABLE([verbose-makecmds],
-[  --enable-verbose-makecmds  enable verbose make command output],
+[  --enable-verbose-makecmds enable verbose make command output],
 if test "$enableval" = "no"
 then
 	AC_MSG_RESULT([Disabling verbose make commands])
diff --git a/e2fsck/Makefile.in b/e2fsck/Makefile.in
index 8296e725..91f3ddf2 100644
--- a/e2fsck/Makefile.in
+++ b/e2fsck/Makefile.in
@@ -201,18 +201,11 @@ install: $(PROGS) $(MANPAGES) $(FMANPAGES) installdirs
 		echo "	INSTALL $(root_sbindir)/$$i"; \
 		$(INSTALL_PROGRAM) $$i $(DESTDIR)$(root_sbindir)/$$i; \
 	done
-	$(E) "	LINK $(root_sbindir)/fsck.ext2"
-	$(Q) $(LN) -f $(DESTDIR)$(root_sbindir)/e2fsck \
-			$(DESTDIR)$(root_sbindir)/fsck.ext2
-	$(E) "	LINK $(root_sbindir)/fsck.ext3"
-	$(Q) $(LN) -f $(DESTDIR)$(root_sbindir)/e2fsck \
-			$(DESTDIR)$(root_sbindir)/fsck.ext3
-	$(E) "	LINK $(root_sbindir)/fsck.ext4"
-	$(Q) $(LN) -f $(DESTDIR)$(root_sbindir)/e2fsck \
-			$(DESTDIR)$(root_sbindir)/fsck.ext4
-	$(E) "	LINK $(root_sbindir)/fsck.ext4dev"
-	$(Q) $(LN) -f $(DESTDIR)$(root_sbindir)/e2fsck \
-			$(DESTDIR)$(root_sbindir)/fsck.ext4dev
+	$(Q) for i in ext2 ext3 ext4 ext4dev; do \
+		echo "	LINK $(root_sbindir)/fsck.$$i"; \
+		(cd $(DESTDIR)$(root_sbindir); \
+			$(LN) $(LINK_INSTALL_FLAGS) e2fsck fsck.$$i); \
+	done
 	$(Q) for i in $(MANPAGES); do \
 		for j in $(COMPRESS_EXT); do \
 			$(RM) -f $(DESTDIR)$(man8dir)/$$i.$$j; \
@@ -227,18 +220,11 @@ install: $(PROGS) $(MANPAGES) $(FMANPAGES) installdirs
 		echo "	INSTALL_DATA $(man5dir)/$$i"; \
 		$(INSTALL_DATA) $$i $(DESTDIR)$(man5dir)/$$i; \
 	done
-	$(E) "	LINK $(man8dir)/fsck.ext2.8"
-	$(Q) $(LN) -f $(DESTDIR)$(man8dir)/e2fsck.8 \
-		$(DESTDIR)$(man8dir)/fsck.ext2.8
-	$(E) "	LINK $(man8dir)/fsck.ext3.8"
-	$(Q) $(LN) -f $(DESTDIR)$(man8dir)/e2fsck.8 \
-		$(DESTDIR)$(man8dir)/fsck.ext3.8
-	$(E) "	LINK $(man8dir)/fsck.ext4.8"
-	$(Q) $(LN) -f $(DESTDIR)$(man8dir)/e2fsck.8 \
-		$(DESTDIR)$(man8dir)/fsck.ext4.8
-	$(E) "	LINK $(man8dir)/fsck.ext4.8"
-	$(Q) $(LN) -f $(DESTDIR)$(man8dir)/e2fsck.8 \
-		$(DESTDIR)$(man8dir)/fsck.ext4dev.8
+	$(Q) for i in ext2 ext3 ext4 ext4dev; do \
+		echo "	LINK $(man8dir)/fsck.$$i.8"; \
+		(cd $(DESTDIR)$(man8dir); \
+			$(LN) $(LINK_INSTALL_FLAGS) e2fsck.8 fsck.$$i.8); \
+	done
 
 install-strip: install
 	$(Q) for i in $(PROGS); do \
diff --git a/lib/Makefile.bsd-lib b/lib/Makefile.bsd-lib
index ec7cae44..51e9dc77 100644
--- a/lib/Makefile.bsd-lib
+++ b/lib/Makefile.bsd-lib
@@ -25,7 +25,8 @@ $(BSD_LIB): $(OBJS)
 	(cd pic; ld -Bshareable -o $(BSD_LIB) $(OBJS))
 	$(MV) pic/$(BSD_LIB) .
 	$(RM) -f ../$(BSD_LIB)
-	$(LN) $(BSD_LIB) ../$(BSD_LIB)
+	(cd ..; $(LN) $(LINK_BUILD_FLAGS) \
+		`echo $(my_dir) | sed -e 's;lib/;;'`/$(BSD_LIB) $(BSD_LIB))
 
 install-shlibs install:: $(BSD_LIB)
 	@echo "	INSTALL_PROGRAM $(BSDLIB_INSTALL_DIR)/$(BSD_LIB)"
diff --git a/lib/Makefile.checker b/lib/Makefile.checker
index cdc1d7b6..7bff0f42 100644
--- a/lib/Makefile.checker
+++ b/lib/Makefile.checker
@@ -13,4 +13,5 @@ $(LIBRARY)_chk.a: $(OBJS)
 	$(Q) (cd checker; $(ARGEN) $@ $(OBJS))
 	-$(Q) $(RANLIB) $@
 	$(Q) $(RM) -f ../$@
-	$(Q) $(LN) $@ ../$@
+	$(Q) (cd .. ; $(LN) $(LINK_BUILD_FLAGS) \
+	     `echo $(my_dir) | sed -e 's;lib/;;'`/$@ $@)
diff --git a/lib/Makefile.darwin-lib b/lib/Makefile.darwin-lib
index a26200b9..c94a5e72 100644
--- a/lib/Makefile.darwin-lib
+++ b/lib/Makefile.darwin-lib
@@ -27,8 +27,9 @@ $(BSD_LIB): $(OBJS)
 		-flat_namespace -undefined warning -o $(BSD_LIB) $(OBJS))
 	$(Q) $(MV) pic/$(BSD_LIB) .
 	$(Q) $(RM) -f ../$(BSD_LIB)
-	$(Q) $(LN) $(BSD_LIB) ../$(BSD_LIB)
-	$(Q) $(LN) ../$(BSD_LIB) ../$(BSDLIB_IMAGE).dylib
+	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) \
+		`echo $(my_dir) | sed -e 's;lib/;;'`/$(BSD_LIB) $(BSD_LIB))
+	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) $(BSD_LIB) $(BSDLIB_IMAGE).dylib)
 
 install-shlibs install:: $(BSD_LIB)
 	$(E) "	INSTALL_PROGRAM $(BSDLIB_INSTALL_DIR)/$(BSD_LIB)"
diff --git a/lib/Makefile.elf-lib b/lib/Makefile.elf-lib
index c0202f43..ea600c7a 100644
--- a/lib/Makefile.elf-lib
+++ b/lib/Makefile.elf-lib
@@ -28,9 +28,10 @@ $(ELF_LIB): $(OBJS)
 		-Wl,-soname,$(ELF_SONAME) $(OBJS) $(ELF_OTHER_LIBS))
 	$(Q) $(MV) elfshared/$(ELF_LIB) .
 	$(Q) $(RM) -f ../$(ELF_LIB) ../$(ELF_IMAGE).so ../$(ELF_SONAME)
-	$(Q) $(LN) $(ELF_LIB) ../$(ELF_LIB)
-	$(Q) $(LN) ../$(ELF_LIB) ../$(ELF_IMAGE).so
-	$(Q) $(LN) ../$(ELF_LIB) ../$(ELF_SONAME)
+	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) \
+		`echo $(my_dir) | sed -e 's;lib/;;'`/$(ELF_LIB) $(ELF_LIB))
+	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) $(ELF_LIB) $(ELF_IMAGE).so)
+	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) $(ELF_LIB) $(ELF_SONAME))
 
 installdirs-elf-lib::
 	$(E) "	MKINSTALLDIRS $(ELF_INSTALL_DIR) $(libdir)"
diff --git a/lib/Makefile.library b/lib/Makefile.library
index f3b12f7a..1b86b023 100644
--- a/lib/Makefile.library
+++ b/lib/Makefile.library
@@ -19,6 +19,7 @@ $(LIBRARY).a: $(OBJS)
 	$(Q) $(ARGEN) $@ $(OBJS)
 	-@$(RANLIB) $@
 	$(Q) $(RM) -f ../$@
-	$(Q) $(LN) $@ ../$@
+	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) \
+		`echo $(my_dir) | sed -e 's;lib/;;'`/$@ $@)
 
 $(LIB)/$(LIBRARY).a: $(LIBRARY).a
diff --git a/lib/Makefile.profile b/lib/Makefile.profile
index 1e07b351..180f5bcf 100644
--- a/lib/Makefile.profile
+++ b/lib/Makefile.profile
@@ -14,7 +14,8 @@ $(LIBRARY)_p.a: $(OBJS)
 	$(Q) (cd profiled; $(ARUPD) ../$@ $(OBJS))
 	-$(Q) $(RANLIB) $@
 	$(Q) $(RM) -f ../$@
-	$(Q) $(LN) $@ ../$@
+	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) \
+		`echo $(my_dir) | sed -e 's;lib/;;'`/$@ $@)
 
 install:: $(LIBRARY)_p.a installdirs
 	$(E) "	INSTALL_DATA $(libdir)/$(LIBRARY)_p.a"
diff --git a/lib/Makefile.solaris-lib b/lib/Makefile.solaris-lib
index f90d714e..92bdbe28 100644
--- a/lib/Makefile.solaris-lib
+++ b/lib/Makefile.solaris-lib
@@ -28,9 +28,10 @@ $(ELF_LIB): $(OBJS)
 		-Wl,-h,$(ELF_SONAME) $(OBJS) $(ELF_OTHER_LIBS))
 	$(Q) $(MV) elfshared/$(ELF_LIB) .
 	$(Q) $(RM) -f ../$(ELF_LIB) ../$(ELF_IMAGE).so ../$(ELF_SONAME)
-	$(Q) $(LN) $(ELF_LIB) ../$(ELF_LIB)
-	$(Q) $(LN) ../$(ELF_LIB) ../$(ELF_IMAGE).so
-	$(Q) $(LN) ../$(ELF_LIB) ../$(ELF_SONAME)
+	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) \
+		`echo $(my_dir) | sed -e 's;lib/;;'`/$(ELF_LIB) $(ELF_LIB))
+	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) $(ELF_LIB) $(ELF_IMAGE).so)
+	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) $(ELF_LIB) $(ELF_SONAME))
 
 installdirs-elf-lib::
 	$(MKINSTALLDIRS) $(DESTDIR)$(ELF_INSTALL_DIR) \
diff --git a/lib/uuid/Makefile.in b/lib/uuid/Makefile.in
index 10e5277c..141b8dca 100644
--- a/lib/uuid/Makefile.in
+++ b/lib/uuid/Makefile.in
@@ -150,9 +150,11 @@ install:: all installdirs
 	$(Q) $(RM) -f $(DESTDIR)$(man3dir)/uuid_generate_random.3.gz \
 		$(DESTDIR)$(man3dir)/uuid_generate_time.3.gz
 	$(E) "	LINK $(man3dir)/uuid_generate_random.3"
-	$(Q) $(LN) -f $(DESTDIR)$(man3dir)/uuid_generate.3 $(DESTDIR)$(man3dir)/uuid_generate_random.3
+	$(Q) (cd $(DESTDIR)$(man3dir); \
+	    $(LN) $(LINK_INSTALL_FLAGS) uuid_generate.3 uuid_generate_random.3)
 	$(E) "	LINK $(man3dir)/uuid_generate_time.3"
-	$(Q) $(LN) -f $(DESTDIR)$(man3dir)/uuid_generate.3 $(DESTDIR)$(man3dir)/uuid_generate_time.3
+	$(Q) (cd $(DESTDIR)$(man3dir); \
+	    $(LN) $(LINK_INSTALL_FLAGS) uuid_generate.3 uuid_generate_time.3)
 	$(E) "	INSTALL_DATA $(libdir)/pkgconfig/uuid.pc"
 	$(Q) $(INSTALL_DATA) uuid.pc $(DESTDIR)$(libdir)/pkgconfig/uuid.pc
 
diff --git a/misc/Makefile.in b/misc/Makefile.in
index 09c6d6ac..def66f0e 100644
--- a/misc/Makefile.in
+++ b/misc/Makefile.in
@@ -403,25 +403,17 @@ install: all $(SMANPAGES) $(UMANPAGES) installdirs
 		echo "	INSTALL $(sbindir)/$$i"; \
 		$(INSTALL_PROGRAM) $$i $(DESTDIR)$(sbindir)/$$i; \
 	done
-	$(E) "	LINK $(root_sbindir)/mkfs.ext2"
-	$(Q) $(LN) -f $(DESTDIR)$(root_sbindir)/mke2fs \
-		$(DESTDIR)$(root_sbindir)/mkfs.ext2
-	$(E) "	LINK $(root_sbindir)/mkfs.ext3"
-	$(Q) $(LN) -f $(DESTDIR)$(root_sbindir)/mke2fs \
-		$(DESTDIR)$(root_sbindir)/mkfs.ext3
-	$(E) "	LINK $(root_sbindir)/mkfs.ext4"
-	$(Q) $(LN) -f $(DESTDIR)$(root_sbindir)/mke2fs \
-		$(DESTDIR)$(root_sbindir)/mkfs.ext4
-	$(E) "	LINK $(root_sbindir)/mkfs.ext4dev"
-	$(Q) $(LN) -f $(DESTDIR)$(root_sbindir)/mke2fs \
-		$(DESTDIR)$(root_sbindir)/mkfs.ext4dev
-	$(E) "	LINK $(root_sbindir)/e2label"
-	$(Q) $(LN) -f $(DESTDIR)$(root_sbindir)/tune2fs \
-		$(DESTDIR)$(root_sbindir)/e2label
+	$(Q) for i in ext2 ext3 ext4 ext4dev; do \
+		echo "	LINK $(root_sbindir)/mkfs.$$i"; \
+		(cd $(DESTDIR)$(root_sbindir); \
+			$(LN) $(LINK_INSTALL_FLAGS) mke2fs mkfs.$$i); \
+	done
+	$(Q) (cd $(DESTDIR)$(root_sbindir); \
+		$(LN) $(LINK_INSTALL_FLAGS) tune2fs e2label)
 	$(Q) if test -n "$(FINDFS_LINK)"; then \
-		echo "  LINK $(root_sbindir)/findfs"; \
-		$(LN) -f $(DESTDIR)$(root_sbindir)/tune2fs \
-			$(DESTDIR)$(root_sbindir)/$(FINDFS_LINK); \
+		echo "	LINK $(root_sbindir)/findfs"; \
+		(cd $(DESTDIR)$(root_sbindir); \
+		$(LN) $(LINK_INSTALL_FLAGS) tune2fs $(FINDFS_LINK)); \
 	fi
 	$(Q) for i in $(UPROGS); do \
 		echo "	INSTALL $(bindir)/$$i"; \
@@ -440,18 +432,11 @@ install: all $(SMANPAGES) $(UMANPAGES) installdirs
 	done
 	$(Q) $(RM) -f $(DESTDIR)$(man8dir)/mkfs.ext2.8.gz \
 		$(DESTDIR)$(man8dir)/mkfs.ext3.8.gz
-	$(E) "	LINK mkfs.ext2.8"
-	$(Q) $(LN) -f $(DESTDIR)$(man8dir)/mke2fs.8 \
-		$(DESTDIR)$(man8dir)/mkfs.ext2.8
-	$(E) "	LINK mkfs.ext3.8"
-	$(Q) $(LN) -f $(DESTDIR)$(man8dir)/mke2fs.8 \
-		$(DESTDIR)$(man8dir)/mkfs.ext3.8
-	$(E) "	LINK mkfs.ext4.8"
-	$(Q) $(LN) -f $(DESTDIR)$(man8dir)/mke2fs.8 \
-		$(DESTDIR)$(man8dir)/mkfs.ext4.8
-	$(E) "	LINK mkfs.ext4dev.8"
-	$(Q) $(LN) -f $(DESTDIR)$(man8dir)/mke2fs.8 \
-		$(DESTDIR)$(man8dir)/mkfs.ext4dev.8
+	$(Q) for i in ext2 ext3 ext4 ext4dev; do \
+		echo "	LINK mkfs.$$i.8"; \
+		(cd $(DESTDIR)$(man8dir); \
+			$(LN) $(LINK_INSTALL_FLAGS) mke2fs.8 mkfs.$$i.8); \
+	done
 	$(Q) for i in $(UMANPAGES); do \
 		for j in $(COMPRESS_EXT); do \
 			$(RM) -f $(DESTDIR)$(man1dir)/$$i.$$j; \