On Fri, Aug 03, 2012 at 09:42:39PM -0400, George Spelvin wrote:
> ../lib/libcom_err.so: undefined reference to `sem_post'
Hmm... I have no idea why this is working for me, but I do see the
problem. I suspect we must be using different versions of Libc, or
the linker, and my environment is much more forgiving, but the problem
is that we're linking -lpthread in the wrong order when creating
libcom_err.so; some how it's not breaking when I do my compiles
though.
The following patch should fix things. I got a bug report which
pointed out the problem just recently.
- Ted
commit 037b728b8a6a775e9a5e03fd24b1008d633c1cb4
Author: Theodore Ts'o <tytso@xxxxxxx>
Date: Sat Aug 4 16:56:55 2012 -0400
Put ELF_OTHER_LIBS in the right place for the linker
Commit a7c17431b9 attempted to fix a problem where the system
libraries might get used instead of local libraries for things like
-lcom_err. It tried to accomplish this by moving $(ELF_OTHER_LIBS) to
before $(LDFLAGS).
Unfortunately, this was the wrong fix; $(ELF_OTHER_LIBS) *MUST* be
after the object files, or the linker might not pull in the necessary
library and not include it into the DT_NEEDED section of the shared
library. The proper fix is to add a -L$(LIB) before $(LDFLAGS), and
then remove the -L option from all of the ELF_OTHER_LIBS definitions
in the library Makefiles.
Addresses-Sourceforge-Bug: #3554345
Cc: Olivier Blin <olivier.blin@xxxxxxxxxxxxxx>
Reported-by: Mike Frysinger <vapier@xxxxxxxxxx>
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
diff --git a/lib/Makefile.elf-lib b/lib/Makefile.elf-lib
index c66281c..6524df5 100644
--- a/lib/Makefile.elf-lib
+++ b/lib/Makefile.elf-lib
@@ -24,8 +24,8 @@ image: $(ELF_LIB)
$(ELF_LIB): $(OBJS)
$(E) " GEN_ELF_SOLIB $(ELF_LIB)"
- $(Q) (cd elfshared; $(CC) --shared -o $(ELF_LIB) $(ELF_OTHER_LIBS) \
- $(LDFLAGS) -Wl,-soname,$(ELF_SONAME) $(OBJS))
+ $(Q) (cd elfshared; $(CC) --shared -o $(ELF_LIB) -L$(LIB) $(LDFLAGS) \
+ -Wl,-soname,$(ELF_SONAME) $(OBJS) $(ELF_OTHER_LIBS))
$(Q) $(MV) elfshared/$(ELF_LIB) .
$(Q) $(RM) -f ../$(ELF_LIB) ../$(ELF_IMAGE).so ../$(ELF_SONAME)
$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) \
diff --git a/lib/Makefile.solaris-lib b/lib/Makefile.solaris-lib
index 66f2b4c..2655ed8 100644
--- a/lib/Makefile.solaris-lib
+++ b/lib/Makefile.solaris-lib
@@ -24,8 +24,8 @@ image: $(ELF_LIB)
$(ELF_LIB): $(OBJS)
$(E) " GEN_ELF_SOLIB $(ELF_LIB)"
- $(Q) (cd elfshared; $(CC) --shared -o $(ELF_LIB) $(ELF_OTHER_LIBS) \
- $(LDFLAGS) -Wl,-h,$(ELF_SONAME) $(OBJS))
+ $(Q) (cd elfshared; $(CC) --shared -o $(ELF_LIB) -L$(LIB) $(LDFLAGS) \
+ -Wl,-h,$(ELF_SONAME) $(OBJS) $(ELF_OTHER_LIBS))
$(Q) $(MV) elfshared/$(ELF_LIB) .
$(Q) $(RM) -f ../$(ELF_LIB) ../$(ELF_IMAGE).so ../$(ELF_SONAME)
$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) \
diff --git a/lib/blkid/Makefile.in b/lib/blkid/Makefile.in
index f23a137..0ec8564 100644
--- a/lib/blkid/Makefile.in
+++ b/lib/blkid/Makefile.in
@@ -36,7 +36,7 @@ ELF_SO_VERSION = 1
ELF_IMAGE = libblkid
ELF_MYDIR = blkid
ELF_INSTALL_DIR = $(root_libdir)
-ELF_OTHER_LIBS = -L../.. -luuid
+ELF_OTHER_LIBS = -luuid
BSDLIB_VERSION = 2.0
BSDLIB_IMAGE = libblkid
diff --git a/lib/ext2fs/Makefile.in b/lib/ext2fs/Makefile.in
index 0d9ac21..fc196fb 100644
--- a/lib/ext2fs/Makefile.in
+++ b/lib/ext2fs/Makefile.in
@@ -180,7 +180,7 @@ ELF_SO_VERSION = 2
ELF_IMAGE = libext2fs
ELF_MYDIR = ext2fs
ELF_INSTALL_DIR = $(root_libdir)
-ELF_OTHER_LIBS = -L../.. -lcom_err
+ELF_OTHER_LIBS = -lcom_err
BSDLIB_VERSION = 2.1
BSDLIB_IMAGE = libext2fs
diff --git a/lib/quota/Makefile.in b/lib/quota/Makefile.in
index 2851eac..720befd 100644
--- a/lib/quota/Makefile.in
+++ b/lib/quota/Makefile.in
@@ -31,7 +31,7 @@ LIBDIR= quota
#ELF_IMAGE = libquota
#ELF_MYDIR = quota
#ELF_INSTALL_DIR = $(root_libdir)
-#ELF_OTHER_LIBS = -L../.. -lext2fs
+#ELF_OTHER_LIBS = -lext2fs
#BSDLIB_VERSION = 1.0
#BSDLIB_IMAGE = libquota
diff --git a/lib/ss/Makefile.in b/lib/ss/Makefile.in
index 19413cc..c396f2d 100644
--- a/lib/ss/Makefile.in
+++ b/lib/ss/Makefile.in
@@ -20,7 +20,7 @@ ELF_SO_VERSION = 2
ELF_IMAGE = libss
ELF_MYDIR = ss
ELF_INSTALL_DIR = $(root_libdir)
-ELF_OTHER_LIBS = -L../.. -lcom_err $(DLOPEN_LIB)
+ELF_OTHER_LIBS = -lcom_err $(DLOPEN_LIB)
BSDLIB_VERSION = 1.0
BSDLIB_IMAGE = libss
--
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