Merged revisions 52997 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r52997 | russell | 2007-01-30 17:23:24 -0600 (Tue, 30 Jan 2007) | 5 lines

When we are checking for a system installed version of libgsm, we need to check
for gsm.h as well.  Furthermore, when checking for this header, it may be
located in a gsm/ sub directory, so check for that, as well.
(issue #8773)

........


git-svn-id: http://svn.digium.com/svn/asterisk/trunk@52998 f38db490-d61c-443f-a65b-d21fe96a405b

4 files changed, 643 insertions, 25 deletions

diff --git a/codecs/codec_gsm.c b/codecs/codec_gsm.c
index 3533650ce..8a3749319 100644
--- a/codecs/codec_gsm.c
+++ b/codecs/codec_gsm.c
@@ -50,7 +50,11 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/channel.h"
 #include "asterisk/utils.h"
 
+#ifdef HAVE_GSM_HEADER
 #include "gsm.h"
+#elif defined(HAVE_GSM_GSM_HEADER)
+#include <gsm/gsm.h>
+#endif
 
 #include "../formats/msgsm.h"
 
diff --git a/configure b/configure
index 2a5378ef8..d34eb4ad7 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.ac Revision: 51291 .
+# From configure.ac Revision: 52463 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61.
 #
@@ -17421,11 +17421,11 @@ if test "${USE_GSM}" != "no"; then
    if test "${GSM_SYSTEM}" = "yes"; then
       gsmlibdir=""
       if test "x${GSM_DIR}" != "x"; then
-      	 if test -d ${GSM_DIR}/lib; then
-	    gsmlibdir="-L${GSM_DIR}/lib"
-	 else
-	    gsmlibdir="-L${GSM_DIR}"
-	 fi
+         if test -d ${GSM_DIR}/lib; then
+            gsmlibdir="-L${GSM_DIR}/lib"
+         else
+            gsmlibdir="-L${GSM_DIR}"
+         fi
       fi
       { echo "$as_me:$LINENO: checking for gsm_create in -lgsm" >&5
 echo $ECHO_N "checking for gsm_create in -lgsm... $ECHO_C" >&6; }
@@ -17497,17 +17497,594 @@ _ACEOF
 fi
 
       if test "${ac_cv_lib_gsm_gsm_create}" = "yes"; then
-	 GSM_LIB="-lgsm"
-	 if test "x${GSM_DIR}" != "x"; then
-	    GSM_LIB="${gsmlibdir} ${GSM_LIB}"
-	    GSM_INCLUDE="-I${GSM_DIR}/include"
-	 fi
-	 PBX_GSM=1
-	 GSM_INTERNAL="no"
+         if test "x${GSM_DIR}" != "x" ; then
+            as_ac_Header=`echo "ac_cv_header_${GSM_DIR}/include/gsm.h" | $as_tr_sh`
+if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
+  { echo "$as_me:$LINENO: checking for ${GSM_DIR}/include/gsm.h" >&5
+echo $ECHO_N "checking for ${GSM_DIR}/include/gsm.h... $ECHO_C" >&6; }
+if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+ac_res=`eval echo '${'$as_ac_Header'}'`
+	       { echo "$as_me:$LINENO: result: $ac_res" >&5
+echo "${ECHO_T}$ac_res" >&6; }
+else
+  # Is the header compilable?
+{ echo "$as_me:$LINENO: checking ${GSM_DIR}/include/gsm.h usability" >&5
+echo $ECHO_N "checking ${GSM_DIR}/include/gsm.h usability... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+#include <${GSM_DIR}/include/gsm.h>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_header_compiler=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6; }
+
+# Is the header present?
+{ echo "$as_me:$LINENO: checking ${GSM_DIR}/include/gsm.h presence" >&5
+echo $ECHO_N "checking ${GSM_DIR}/include/gsm.h presence... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <${GSM_DIR}/include/gsm.h>
+_ACEOF
+if { (ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null && {
+	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       }; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  ac_header_preproc=no
+fi
+
+rm -f conftest.err conftest.$ac_ext
+{ echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6; }
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
+  yes:no: )
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm.h: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm.h: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm.h: proceeding with the compiler's result" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm.h: proceeding with the compiler's result" >&2;}
+    ac_header_preproc=yes
+    ;;
+  no:yes:* )
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm.h: present but cannot be compiled" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm.h: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm.h:     check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm.h:     check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm.h: see the Autoconf documentation" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm.h: see the Autoconf documentation" >&2;}
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm.h:     section \"Present But Cannot Be Compiled\"" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm.h:     section \"Present But Cannot Be Compiled\"" >&2;}
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm.h: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm.h: proceeding with the preprocessor's result" >&2;}
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm.h: in the future, the compiler will take precedence" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm.h: in the future, the compiler will take precedence" >&2;}
+
+    ;;
+esac
+{ echo "$as_me:$LINENO: checking for ${GSM_DIR}/include/gsm.h" >&5
+echo $ECHO_N "checking for ${GSM_DIR}/include/gsm.h... $ECHO_C" >&6; }
+if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  eval "$as_ac_Header=\$ac_header_preproc"
+fi
+ac_res=`eval echo '${'$as_ac_Header'}'`
+	       { echo "$as_me:$LINENO: result: $ac_res" >&5
+echo "${ECHO_T}$ac_res" >&6; }
+
+fi
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+  GSM_HEADER_FOUND=1
+else
+  GSM_HEADER_FOUND=0
+fi
+
+
+            as_ac_Header=`echo "ac_cv_header_${GSM_DIR}/include/gsm/gsm.h" | $as_tr_sh`
+if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
+  { echo "$as_me:$LINENO: checking for ${GSM_DIR}/include/gsm/gsm.h" >&5
+echo $ECHO_N "checking for ${GSM_DIR}/include/gsm/gsm.h... $ECHO_C" >&6; }
+if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+ac_res=`eval echo '${'$as_ac_Header'}'`
+	       { echo "$as_me:$LINENO: result: $ac_res" >&5
+echo "${ECHO_T}$ac_res" >&6; }
+else
+  # Is the header compilable?
+{ echo "$as_me:$LINENO: checking ${GSM_DIR}/include/gsm/gsm.h usability" >&5
+echo $ECHO_N "checking ${GSM_DIR}/include/gsm/gsm.h usability... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+#include <${GSM_DIR}/include/gsm/gsm.h>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_header_compiler=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6; }
+
+# Is the header present?
+{ echo "$as_me:$LINENO: checking ${GSM_DIR}/include/gsm/gsm.h presence" >&5
+echo $ECHO_N "checking ${GSM_DIR}/include/gsm/gsm.h presence... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <${GSM_DIR}/include/gsm/gsm.h>
+_ACEOF
+if { (ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null && {
+	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       }; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  ac_header_preproc=no
+fi
+
+rm -f conftest.err conftest.$ac_ext
+{ echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6; }
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
+  yes:no: )
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm/gsm.h: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm/gsm.h: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm/gsm.h: proceeding with the compiler's result" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm/gsm.h: proceeding with the compiler's result" >&2;}
+    ac_header_preproc=yes
+    ;;
+  no:yes:* )
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm/gsm.h: present but cannot be compiled" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm/gsm.h: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm/gsm.h:     check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm/gsm.h:     check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm/gsm.h: see the Autoconf documentation" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm/gsm.h: see the Autoconf documentation" >&2;}
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm/gsm.h:     section \"Present But Cannot Be Compiled\"" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm/gsm.h:     section \"Present But Cannot Be Compiled\"" >&2;}
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm/gsm.h: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm/gsm.h: proceeding with the preprocessor's result" >&2;}
+    { echo "$as_me:$LINENO: WARNING: ${GSM_DIR}/include/gsm/gsm.h: in the future, the compiler will take precedence" >&5
+echo "$as_me: WARNING: ${GSM_DIR}/include/gsm/gsm.h: in the future, the compiler will take precedence" >&2;}
+
+    ;;
+esac
+{ echo "$as_me:$LINENO: checking for ${GSM_DIR}/include/gsm/gsm.h" >&5
+echo $ECHO_N "checking for ${GSM_DIR}/include/gsm/gsm.h... $ECHO_C" >&6; }
+if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  eval "$as_ac_Header=\$ac_header_preproc"
+fi
+ac_res=`eval echo '${'$as_ac_Header'}'`
+	       { echo "$as_me:$LINENO: result: $ac_res" >&5
+echo "${ECHO_T}$ac_res" >&6; }
+
+fi
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+  GSM_GSM_HEADER_FOUND=1
+else
+  GSM_GSM_HEADER_FOUND=0
+fi
+
+
+         else
+            if test "${ac_cv_header_gsm_h+set}" = set; then
+  { echo "$as_me:$LINENO: checking for gsm.h" >&5
+echo $ECHO_N "checking for gsm.h... $ECHO_C" >&6; }
+if test "${ac_cv_header_gsm_h+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_header_gsm_h" >&5
+echo "${ECHO_T}$ac_cv_header_gsm_h" >&6; }
+else
+  # Is the header compilable?
+{ echo "$as_me:$LINENO: checking gsm.h usability" >&5
+echo $ECHO_N "checking gsm.h usability... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+#include <gsm.h>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_header_compiler=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6; }
+
+# Is the header present?
+{ echo "$as_me:$LINENO: checking gsm.h presence" >&5
+echo $ECHO_N "checking gsm.h presence... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <gsm.h>
+_ACEOF
+if { (ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null && {
+	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       }; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  ac_header_preproc=no
+fi
+
+rm -f conftest.err conftest.$ac_ext
+{ echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6; }
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
+  yes:no: )
+    { echo "$as_me:$LINENO: WARNING: gsm.h: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: gsm.h: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: gsm.h: proceeding with the compiler's result" >&5
+echo "$as_me: WARNING: gsm.h: proceeding with the compiler's result" >&2;}
+    ac_header_preproc=yes
+    ;;
+  no:yes:* )
+    { echo "$as_me:$LINENO: WARNING: gsm.h: present but cannot be compiled" >&5
+echo "$as_me: WARNING: gsm.h: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: gsm.h:     check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: gsm.h:     check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: gsm.h: see the Autoconf documentation" >&5
+echo "$as_me: WARNING: gsm.h: see the Autoconf documentation" >&2;}
+    { echo "$as_me:$LINENO: WARNING: gsm.h:     section \"Present But Cannot Be Compiled\"" >&5
+echo "$as_me: WARNING: gsm.h:     section \"Present But Cannot Be Compiled\"" >&2;}
+    { echo "$as_me:$LINENO: WARNING: gsm.h: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: gsm.h: proceeding with the preprocessor's result" >&2;}
+    { echo "$as_me:$LINENO: WARNING: gsm.h: in the future, the compiler will take precedence" >&5
+echo "$as_me: WARNING: gsm.h: in the future, the compiler will take precedence" >&2;}
+
+    ;;
+esac
+{ echo "$as_me:$LINENO: checking for gsm.h" >&5
+echo $ECHO_N "checking for gsm.h... $ECHO_C" >&6; }
+if test "${ac_cv_header_gsm_h+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_cv_header_gsm_h=$ac_header_preproc
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_header_gsm_h" >&5
+echo "${ECHO_T}$ac_cv_header_gsm_h" >&6; }
+
+fi
+if test $ac_cv_header_gsm_h = yes; then
+  GSM_HEADER_FOUND=1
+else
+  GSM_HEADER_FOUND=0
+fi
+
+
+            if test "${ac_cv_header_gsm_gsm_h+set}" = set; then
+  { echo "$as_me:$LINENO: checking for gsm/gsm.h" >&5
+echo $ECHO_N "checking for gsm/gsm.h... $ECHO_C" >&6; }
+if test "${ac_cv_header_gsm_gsm_h+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_header_gsm_gsm_h" >&5
+echo "${ECHO_T}$ac_cv_header_gsm_gsm_h" >&6; }
+else
+  # Is the header compilable?
+{ echo "$as_me:$LINENO: checking gsm/gsm.h usability" >&5
+echo $ECHO_N "checking gsm/gsm.h usability... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+#include <gsm/gsm.h>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_header_compiler=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6; }
+
+# Is the header present?
+{ echo "$as_me:$LINENO: checking gsm/gsm.h presence" >&5
+echo $ECHO_N "checking gsm/gsm.h presence... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <gsm/gsm.h>
+_ACEOF
+if { (ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null && {
+	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       }; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  ac_header_preproc=no
+fi
+
+rm -f conftest.err conftest.$ac_ext
+{ echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6; }
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
+  yes:no: )
+    { echo "$as_me:$LINENO: WARNING: gsm/gsm.h: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: gsm/gsm.h: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: gsm/gsm.h: proceeding with the compiler's result" >&5
+echo "$as_me: WARNING: gsm/gsm.h: proceeding with the compiler's result" >&2;}
+    ac_header_preproc=yes
+    ;;
+  no:yes:* )
+    { echo "$as_me:$LINENO: WARNING: gsm/gsm.h: present but cannot be compiled" >&5
+echo "$as_me: WARNING: gsm/gsm.h: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: gsm/gsm.h:     check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: gsm/gsm.h:     check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: gsm/gsm.h: see the Autoconf documentation" >&5
+echo "$as_me: WARNING: gsm/gsm.h: see the Autoconf documentation" >&2;}
+    { echo "$as_me:$LINENO: WARNING: gsm/gsm.h:     section \"Present But Cannot Be Compiled\"" >&5
+echo "$as_me: WARNING: gsm/gsm.h:     section \"Present But Cannot Be Compiled\"" >&2;}
+    { echo "$as_me:$LINENO: WARNING: gsm/gsm.h: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: gsm/gsm.h: proceeding with the preprocessor's result" >&2;}
+    { echo "$as_me:$LINENO: WARNING: gsm/gsm.h: in the future, the compiler will take precedence" >&5
+echo "$as_me: WARNING: gsm/gsm.h: in the future, the compiler will take precedence" >&2;}
+
+    ;;
+esac
+{ echo "$as_me:$LINENO: checking for gsm/gsm.h" >&5
+echo $ECHO_N "checking for gsm/gsm.h... $ECHO_C" >&6; }
+if test "${ac_cv_header_gsm_gsm_h+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_cv_header_gsm_gsm_h=$ac_header_preproc
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_header_gsm_gsm_h" >&5
+echo "${ECHO_T}$ac_cv_header_gsm_gsm_h" >&6; }
+
+fi
+if test $ac_cv_header_gsm_gsm_h = yes; then
+  GSM_GSM_HEADER_FOUND=1
+else
+  GSM_GSM_HEADER_FOUND=0
+fi
+
+
+         fi
+         if test "${GSM_HEADER_FOUND}" = "0" ; then
+            if test "{GSM_GSM_HEADER_FOUND}" = "0" ; then
+               if test "x${GSM_MANDATORY}" = "xyes" ; then
+                  { echo "$as_me:$LINENO: ***" >&5
+echo "$as_me: ***" >&6;}
+                  { echo "$as_me:$LINENO: *** It appears that you do not have the gsm development package installed." >&5
+echo "$as_me: *** It appears that you do not have the gsm development package installed." >&6;}
+                  { echo "$as_me:$LINENO: *** Please install it to include ${GSM_DESCRIP} support, or re-run configure" >&5
+echo "$as_me: *** Please install it to include ${GSM_DESCRIP} support, or re-run configure" >&6;}
+                  { echo "$as_me:$LINENO: *** without explicitly specifying --with-${GSM_OPTION}" >&5
+echo "$as_me: *** without explicitly specifying --with-${GSM_OPTION}" >&6;}
+                  exit 1
+               fi
+            fi
+         fi
+         GSM_OK=0
+         if test "${GSM_HEADER_FOUND}" = "1" ; then
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_GSM_HEADER 1
+_ACEOF
+
+            GSM_OK=1
+         else
+            if test "${GSM_GSM_HEADER_FOUND}" = "1" ; then
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_GSM_GSM_HEADER 1
+_ACEOF
+
+               GSM_OK=1
+            fi
+         fi
+         if test "${GSM_OK}" = "1" ; then
+            GSM_LIB="-lgsm"
+            if test "x${GSM_DIR}" != "x"; then
+               GSM_LIB="${gsmlibdir} ${GSM_LIB}"
+               GSM_INCLUDE="-I${GSM_DIR}/include"
+            fi
+            PBX_GSM=1
+            GSM_INTERNAL="no"
+         fi
       fi
    fi
    if test "${GSM_INTERNAL}" = "yes"; then
       PBX_GSM=1
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_GSM_HEADER 1
+_ACEOF
+
    fi
 fi
 
diff --git a/configure.ac b/configure.ac
index f8927357b..60310762b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -362,26 +362,57 @@ if test "${USE_GSM}" != "no"; then
    if test "${GSM_SYSTEM}" = "yes"; then
       gsmlibdir=""
       if test "x${GSM_DIR}" != "x"; then
-      	 if test -d ${GSM_DIR}/lib; then
-	    gsmlibdir="-L${GSM_DIR}/lib"
-	 else
-	    gsmlibdir="-L${GSM_DIR}"
-	 fi
+         if test -d ${GSM_DIR}/lib; then
+            gsmlibdir="-L${GSM_DIR}/lib"
+         else
+            gsmlibdir="-L${GSM_DIR}"
+         fi
       fi
       AC_CHECK_LIB([gsm], [gsm_create], AC_DEFINE_UNQUOTED([HAVE_GSM], 1,
       [Define to indicate the GSM library]), [], ${gsmlibdir})
       if test "${ac_cv_lib_gsm_gsm_create}" = "yes"; then
-	 GSM_LIB="-lgsm"
-	 if test "x${GSM_DIR}" != "x"; then
-	    GSM_LIB="${gsmlibdir} ${GSM_LIB}"
-	    GSM_INCLUDE="-I${GSM_DIR}/include"
-	 fi
-	 PBX_GSM=1
-	 GSM_INTERNAL="no"
+         if test "x${GSM_DIR}" != "x" ; then
+            AC_CHECK_HEADER([${GSM_DIR}/include/gsm.h], [GSM_HEADER_FOUND=1], [GSM_HEADER_FOUND=0])
+            AC_CHECK_HEADER([${GSM_DIR}/include/gsm/gsm.h], [GSM_GSM_HEADER_FOUND=1], [GSM_GSM_HEADER_FOUND=0])
+         else
+            AC_CHECK_HEADER([gsm.h], [GSM_HEADER_FOUND=1], [GSM_HEADER_FOUND=0])
+            AC_CHECK_HEADER([gsm/gsm.h], [GSM_GSM_HEADER_FOUND=1], [GSM_GSM_HEADER_FOUND=0])
+         fi
+         if test "${GSM_HEADER_FOUND}" = "0" ; then
+            if test "{GSM_GSM_HEADER_FOUND}" = "0" ; then
+               if test "x${GSM_MANDATORY}" = "xyes" ; then
+                  AC_MSG_NOTICE([***])
+                  AC_MSG_NOTICE([*** It appears that you do not have the gsm development package installed.])
+                  AC_MSG_NOTICE([*** Please install it to include ${GSM_DESCRIP} support, or re-run configure])
+                  AC_MSG_NOTICE([*** without explicitly specifying --with-${GSM_OPTION}])
+                  exit 1
+               fi
+            fi
+         fi
+         GSM_OK=0
+         if test "${GSM_HEADER_FOUND}" = "1" ; then
+            AC_DEFINE_UNQUOTED([HAVE_GSM_HEADER], 1, [Define to indicate that gsm.h has no prefix for its location])
+            GSM_OK=1
+         else
+            if test "${GSM_GSM_HEADER_FOUND}" = "1" ; then
+               AC_DEFINE_UNQUOTED([HAVE_GSM_GSM_HEADER], 1, [Define to indicate that gsm.h is in gsm/gsm.h])
+               GSM_OK=1
+            fi
+         fi
+         if test "${GSM_OK}" = "1" ; then
+            GSM_LIB="-lgsm"
+            if test "x${GSM_DIR}" != "x"; then
+               GSM_LIB="${gsmlibdir} ${GSM_LIB}"
+               GSM_INCLUDE="-I${GSM_DIR}/include"
+            fi
+            PBX_GSM=1
+            GSM_INTERNAL="no"
+         fi
       fi
    fi
    if test "${GSM_INTERNAL}" = "yes"; then
       PBX_GSM=1
+      AC_DEFINE_UNQUOTED([HAVE_GSM_HEADER], 1, [Define to indicate that gsm.h has no prefix for its location])
    fi
 fi
 
diff --git a/include/asterisk/autoconfig.h.in b/include/asterisk/autoconfig.h.in
index cafa78eb3..458bee9fd 100644
--- a/include/asterisk/autoconfig.h.in
+++ b/include/asterisk/autoconfig.h.in
@@ -159,6 +159,12 @@
 /* Define to indicate the GSM library */
 #undef HAVE_GSM
 
+/* Define to indicate that gsm.h is in gsm/gsm.h */
+#undef HAVE_GSM_GSM_HEADER
+
+/* Define to indicate that gsm.h has no prefix for its location */
+#undef HAVE_GSM_HEADER
+
 /* Define if your system has the GTK libraries. */
 #undef HAVE_GTK