FS-3638: Rework platform library/linker flags handling and libfreeswitch…

FS-3638: Rework platform library/linker flags handling and libfreeswitch _LDFLAGS/_LIBS to fix applications

This fixes the linking order problems reported in FS-3638.

Clean up libfreeswitch dependency handling:

        PLATFORM_CORE_LDFLAGS - Non-library linker flags, specific to this platform
        PLATFORM_CORE_LIBS    - Library flags/libraries need to build libfreeswitch on this platform

Drop LDADD dependencies from tone2wav and fs_encode, except for libfreeswitch.la, which will
"automagically" pull in all other libraries, now that we fixed libfreeswitch.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

Makefile.am

@@ -133,8 +133,8 @@ endif
 ##
 lib_LTLIBRARIES	         = libfreeswitch.la
 libfreeswitch_la_CFLAGS  = $(CORE_CFLAGS) $(AM_CFLAGS)
-libfreeswitch_la_LDFLAGS = -version-info 1:0:0 $(AM_LDFLAGS) $(PLATFORM_CORE_DEPLIBS)
-libfreeswitch_la_LIBADD  = $(CORE_LIBS)
+libfreeswitch_la_LDFLAGS = -version-info 1:0:0 $(AM_LDFLAGS) $(PLATFORM_CORE_LDFLAGS)
+libfreeswitch_la_LIBADD  = $(CORE_LIBS) $(PLATFORM_CORE_LIBS)
 libfreeswitch_la_DEPENDENCIES = $(BUILT_SOURCES)
 
 if HAVE_ODBC
@@ -299,16 +299,16 @@ endif
 ##
 fs_encode_SOURCES = src/fs_encode.c
 fs_encode_CFLAGS = $(AM_CFLAGS)
-fs_encode_LDFLAGS = $(AM_LDFLAGS) $(CORE_LIBS)
-fs_encode_LDADD = libfreeswitch.la -lcrypt -lrt
+fs_encode_LDFLAGS = $(AM_LDFLAGS)
+fs_encode_LDADD = libfreeswitch.la
 
 ##
 ## tone2wav ()
 ##
 tone2wav_SOURCES = src/tone2wav.c
 tone2wav_CFLAGS  = $(AM_CFLAGS)
-tone2wav_LDFLAGS = $(AM_LDFLAGS) $(CORE_LIBS)
-tone2wav_LDADD   = libfreeswitch.la -lcrypt -lrt
+tone2wav_LDFLAGS = $(AM_LDFLAGS)
+tone2wav_LDADD   = libfreeswitch.la
 
 ##
 ## fs_ivrd ()

configure.in

@@ -407,7 +407,8 @@ APR_ADDTO(SWITCH_AM_LDFLAGS, -lresolv)
 fi
 
 ESL_LDFLAGS=
-PLATFORM_CORE_DEPLIBS=
+PLATFORM_CORE_LDFLAGS=
+PLATFORM_CORE_LIBS=
 # tweak platform specific flags
 case "$host" in
     *darwin10.*)
@@ -417,23 +418,30 @@ case "$host" in
         APR_ADDTO(CXXFLAGS, -pipe)
         APR_REMOVEFROM(SWITCH_AM_CFLAGS, -fPIC)
 	if test "x$enable_core_odbc_support" != "xno"; then
-	        APR_ADDTO(PLATFORM_CORE_DEPLIBS, --framework CoreFoundation)
+	        APR_ADDTO([PLATFORM_CORE_LDFLAGS], [--framework CoreFoundation])
 	fi
+	APR_ADDTO([PLATFORM_CORE_LIBS], [-ldl -lcrypt -lrt])
     ;;
     *darwin*)
         APR_ADDTO(SWITCH_AM_CFLAGS, -DMACOSX)
         APR_REMOVEFROM(SWITCH_AM_CFLAGS, -fPIC)
 	if test "x$enable_core_odbc_support" != "xno"; then
-	        APR_ADDTO(PLATFORM_CORE_DEPLIBS, --framework CoreFoundation)
+	        APR_ADDTO([PLATFORM_CORE_LDFLAGS], [--framework CoreFoundation])
 	fi
+	APR_ADDTO([PLATFORM_CORE_LIBS], [-ldl -lcrypt -lrt])
     ;;
     *-solaris2*)
         APR_ADDTO(SWITCH_AM_CFLAGS, -DPATH_MAX=2048 -D__EXTENSIONS__)
         APR_ADDTO(SWITCH_AM_LDFLAGS, -lsendfile -lresolv -lsocket -lnsl -luuid)
         APR_ADDTO(ESL_LDFLAGS, -lnsl -lsocket)
+	APR_ADDTO([PLATFORM_CORE_LIBS], [-ldl -lcrypt -lrt -lsendfile -lresolv -lsocket -lnsl -luuid])
     ;;
     *bsd*)
         APR_ADDTO(SWITCH_AM_CFLAGS, -I/usr/local/include)
+	APR_ADDTO([PLATFORM_CORE_LIBS], [-ldl -lcrypt -lrt])
+    ;;
+    *linux*)
+	APR_ADDTO([PLATFORM_CORE_LIBS], [-ldl -lcrypt -lrt])
     ;;
 esac
 
@@ -444,7 +452,8 @@ AC_SUBST(SWITCH_ANSI_CFLAGS)
 AC_SUBST(SWITCH_AM_CXXFLAGS)
 AC_SUBST(SWITCH_AM_LDFLAGS)
 AC_SUBST(ESL_LDFLAGS)
-AC_SUBST(PLATFORM_CORE_DEPLIBS)
+AC_SUBST(PLATFORM_CORE_LDFLAGS)
+AC_SUBST(PLATFORM_CORE_LIBS)
 AC_SUBST(SOLINK)
 AC_SUBST(DYNAMIC_LIB_EXTEN)
 AC_SUBST(LIBTOOL_LIB_EXTEN)