Do not hard-code -g and -O2 in CFLAGS

Let the user decide on the optimization level and debugging info.

Change-Id: I4b0b523b7dac4d67413bda37b546964262e5ea0d
diff --git a/ggsn/Makefile.am b/ggsn/Makefile.am
index eea7c6e..d4c82ad 100644
--- a/ggsn/Makefile.am
+++ b/ggsn/Makefile.am
@@ -2,7 +2,7 @@
 
 AM_LDFLAGS = @EXEC_LDFLAGS@
 
-AM_CFLAGS = -O2 -D_GNU_SOURCE -fno-builtin -Wall -DSBINDIR='"$(sbindir)"' -ggdb $(LIBOSMOCORE_CFLAGS) $(LIBOSMOCTRL_CFLAGS) $(LIBOSMOVTY_CFLAGS)
+AM_CFLAGS = -D_GNU_SOURCE -fno-builtin -Wall -DSBINDIR='"$(sbindir)"' $(LIBOSMOCORE_CFLAGS) $(LIBOSMOCTRL_CFLAGS) $(LIBOSMOVTY_CFLAGS)
 
 osmo_ggsn_LDADD = @EXEC_LDADD@ -lgtp -L../gtp ../lib/libmisc.a $(LIBOSMOCORE_LIBS) $(LIBOSMOCTRL_LIBS) $(LIBOSMOVTY_LIBS)
 
diff --git a/gtp/Makefile.am b/gtp/Makefile.am
index 8e2aa0b..cb32da7 100644
--- a/gtp/Makefile.am
+++ b/gtp/Makefile.am
@@ -8,7 +8,7 @@
 
 include_HEADERS = gtp.h gsn.h pdp.h gtpie.h
 
-AM_CFLAGS = -O2 -fno-builtin -Wall -DSBINDIR='"$(sbindir)"' -ggdb $(LIBOSMOCORE_CFLAGS)
+AM_CFLAGS = -fno-builtin -Wall -DSBINDIR='"$(sbindir)"' $(LIBOSMOCORE_CFLAGS)
 
 libgtp_la_SOURCES = gtp.c gtp.h gsn.c gsn.h gtpie.c gtpie.h pdp.c pdp.h lookupa.c lookupa.h queue.c queue.h
 libgtp_la_LDFLAGS = -version-info $(LIBVERSION) -no-undefined
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 5bd9443..9dcd13b 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -2,7 +2,7 @@
 
 noinst_HEADERS = gnugetopt.h ippool.h lookup.h syserr.h tun.h in46_addr.h netdev.h gtp-kernel.h netns.h util.h icmpv6.h checksum.h
 
-AM_CFLAGS = -O2 -fno-builtin -Wall -DSBINDIR='"$(sbindir)"' -ggdb $(LIBOSMOCORE_CFLAGS)
+AM_CFLAGS = -fno-builtin -Wall -DSBINDIR='"$(sbindir)"' $(LIBOSMOCORE_CFLAGS)
 
 libmisc_a_SOURCES = getopt1.c getopt.c ippool.c lookup.c tun.c debug.c in46_addr.c netdev.c netns.c util.c icmpv6.c checksum.c
 
diff --git a/sgsnemu/Makefile.am b/sgsnemu/Makefile.am
index 9f10cd2..1f75de0 100644
--- a/sgsnemu/Makefile.am
+++ b/sgsnemu/Makefile.am
@@ -2,7 +2,7 @@
 
 AM_LDFLAGS = @EXEC_LDFLAGS@
 
-AM_CFLAGS = -O2 -D_GNU_SOURCE -fno-builtin -Wall -DSBINDIR='"$(sbindir)"' -ggdb $(LIBOSMOCORE_CFLAGS)
+AM_CFLAGS = -D_GNU_SOURCE -fno-builtin -Wall -DSBINDIR='"$(sbindir)"' $(LIBOSMOCORE_CFLAGS)
 
 sgsnemu_LDADD = @EXEC_LDADD@ -lgtp -L../gtp ../lib/libmisc.a $(LIBOSMOCORE_LIBS)
 
diff --git a/tests/gtp/Makefile.am b/tests/gtp/Makefile.am
index 3dce716..e49d824 100644
--- a/tests/gtp/Makefile.am
+++ b/tests/gtp/Makefile.am
@@ -1,4 +1,4 @@
-AM_CFLAGS = -Wall -I$(top_srcdir)/include $(LIBOSMOCORE_CFLAGS) -g
+AM_CFLAGS = -Wall -I$(top_srcdir)/include $(LIBOSMOCORE_CFLAGS)
 
 EXTRA_DIST = \
 	gtpie_test.ok \
diff --git a/tests/lib/Makefile.am b/tests/lib/Makefile.am
index 03a5d99..8f0301c 100644
--- a/tests/lib/Makefile.am
+++ b/tests/lib/Makefile.am
@@ -1,4 +1,4 @@
-AM_CFLAGS = -Wall -I$(top_srcdir)/include $(LIBOSMOCORE_CFLAGS) -g
+AM_CFLAGS = -Wall -I$(top_srcdir)/include $(LIBOSMOCORE_CFLAGS)
 
 EXTRA_DIST = ippool_test.ok \
 	     ippool_test.err \