Makefile: Fix final linking of notmuch binary for OS X.

Apparently the OS X linker can't resolve symbols when linking a
program (notmuch) against a library (libnotmuch) when the library
depends on another library (libgmime) that the program doesn't depend
on directly.

For this case, we need to link the program directly against both
libraries, but we don't want to do this on Linux, where the linker can
do this on its own and the explicit, unneeded link would cause
problems.

diff --git a/Makefile.local b/Makefile.local
index 79ac50d4ff555b736a3d78fcfb89843839ed50e0..4a8142f03e6c9810a5d23d046ef5cbac90c74406 100644 (file)
--- a/Makefile.local
+++ b/Makefile.local
@@ -23,6 +23,9 @@ GPG_FILE=$(SHA1_FILE).asc
 FINAL_CFLAGS = -DNOTMUCH_VERSION=$(VERSION) $(CFLAGS) $(WARN_CFLAGS) $(CONFIGURE_CFLAGS) $(extra_cflags)
 FINAL_CXXFLAGS = $(CXXFLAGS) $(WARN_CXXFLAGS) $(CONFIGURE_CXXFLAGS) $(extra_cflags) $(extra_cxxflags)
 FINAL_NOTMUCH_LDFLAGS = $(LDFLAGS) -Llib -lnotmuch
+ifneq ($(LINKER_RESOLVES_LIBRARY_DEPENDENCIES),1)
+FINAL_NOTMUCH_LDFLAGS += $(CONFIGURE_LDFLAGS)
+endif
 FINAL_LIBNOTMUCH_LDFLAGS = $(LDFLAGS) $(CONFIGURE_LDFLAGS)
 
 .PHONY: all

diff --git a/configure b/configure
index 8af3dc9e24db5ec8c58758eea7ca83147a17bf5d..eebe0751bad9b128d18956de30c34e1948484005 100755 (executable)
--- a/configure
+++ b/configure
@@ -238,9 +238,11 @@ printf "Checking for Mac OS X (for shared library)... "
 if [ `uname` = "Darwin" ] ; then
     printf "Yes.\n"
     mac_os_x=1
+    linker_resolves_library_dependencies = 0
 else
     printf "No.\n"
     mac_os_x=0
+    linker_resolves_library_dependencies = 1
 fi
 
 if [ $errors -gt 0 ]; then
@@ -412,6 +414,11 @@ HAVE_STRCASESTR = ${have_strcasestr}
 # shared library.
 MAC_OS_X = ${mac_os_x}
 
+# Whether the linker will automatically resolve the dependency of one
+# library on another (if not, then linking a binary requires linking
+# directly against both)
+LINKER_RESOLVES_LIBRARY_DEPENDENCIES = ${linker_resolves_library_dependencies}
+
 # Flags needed to compile and link against Xapian
 XAPIAN_CXXFLAGS = ${xapian_cxxflags}
 XAPIAN_LDFLAGS = ${xapian_ldflags}