OSX patches from Stelios, M0GLD

git-svn-id: https://hamlib.svn.sourceforge.net/svnroot/hamlib/trunk@2742 7ae35d74-ebe9-4afe-98af-79ac388436b8

configure.ac

@@ -187,6 +187,11 @@ darwin* | rhapsody*)
   # TODO: check the compiler actually does support these options
   CFLAGS="${CFLAGS} -no-cpp-precomp"
   CXXFLAGS="${CXXFLAGS} -no-cpp-precomp"
+  # Tell the OS X linker to allocate enough space inside the
+  # libhamlib.X.dylib shared object for install_name_tool(1) to
+  # work. This is useful when including hamlib in an app bundle.
+  OSXLDFLAGS="-Wl,-headerpad_max_install_names"
+  AC_SUBST([OSXLDFLAGS])
   ;;
 mingw* | pw32* | cygwin*)
   WINLDFLAGS="-Wl,--output-def,libhamlib.def -Wl,--add-stdcall-alias"

src/Makefile.am

@@ -5,7 +5,7 @@ RIGSRC = rig.c serial.c misc.c register.c event.c cal.c conf.c tones.c \
 
 lib_LTLIBRARIES = libhamlib.la
 libhamlib_la_SOURCES = $(RIGSRC)
-libhamlib_la_LDFLAGS = $(WINLDFLAGS) -no-undefined -version-info @ABI_VERSION@:10:0
+libhamlib_la_LDFLAGS = $(WINLDFLAGS) $(OSXLDFLAGS) -no-undefined -version-info @ABI_VERSION@:10:0
 libhamlib_la_CFLAGS = -DIN_HAMLIB $(AM_CFLAGS) -DHAMLIB_MODULE_DIR=\"$(libdir)\"
 libhamlib_la_LIBADD = @LIBLTDL@ $(top_builddir)/lib/libmisc.la \
 		      @NET_LIBS@ @MATH_LIBS@ $(LIBUSB_LIBS)