Include debugging symbols in tests by default to improve stack traces
and also set the compiler optimisation level to improve the debugging
experience.
Signed-off-by: Thomas Wood <thomas.wood@xxxxxxxxx>
---
configure.ac | 14 ++++++++++++
m4/as-compiler-flag.m4 | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++
tests/Makefile.am | 2 +-
3 files changed, 77 insertions(+), 1 deletion(-)
create mode 100644 m4/as-compiler-flag.m4
diff --git a/configure.ac b/configure.ac
index b9ecef8..51595ad 100644
--- a/configure.ac
+++ b/configure.ac
@@ -196,6 +196,19 @@ if test "x$with_libunwind" = xyes; then
AC_MSG_ERROR([libunwind not found. Use --without-libunwind to disable libunwind support.]))
fi
+# enable debug symbols
+AC_ARG_ENABLE(debug,
+ AS_HELP_STRING([--disable-debug],
+ [Build tests without debug symbols]),
+ [], [enable_debug=yes])
+
+if test "x$enable_debug" = xyes; then
+ AS_COMPILER_FLAG([-g3], [DEBUG_CFLAGS="-g3"], [DEBUG_CFLAGS="-g"])
+ AS_COMPILER_FLAG([-Og], [DEBUG_CFLAGS+=" -Og -Wno-maybe-uninitialized"], # disable maybe-uninitialized due to false positives
+ [DEBUG_CFLAGS+=" -O0"])
+ AC_SUBST([DEBUG_CFLAGS])
+fi
+
# -----------------------------------------------------------------------------
# To build multithread code, gcc uses -pthread, Solaris Studio cc uses -mt
@@ -253,6 +266,7 @@ echo " • Tests:"
echo " Build tests : ${BUILD_TESTS}"
echo " Compile prime tests: ${NOUVEAU}"
echo " Print stack traces : ${with_libunwind}"
+echo " Debug flags : ${DEBUG_CFLAGS}"
echo ""
echo " • Tools:"
echo " Assembler : ${enable_assembler}"
diff --git a/m4/as-compiler-flag.m4 b/m4/as-compiler-flag.m4
new file mode 100644
index 0000000..0f660cf
--- /dev/null
+++ b/m4/as-compiler-flag.m4
@@ -0,0 +1,62 @@
+dnl as-compiler-flag.m4 0.1.0
+
+dnl autostars m4 macro for detection of compiler flags
+
+dnl David Schleef <ds@xxxxxxxxxxx>
+
+dnl $Id: as-compiler-flag.m4,v 1.1 2005/12/15 23:35:19 ds Exp $
+
+dnl AS_COMPILER_FLAG(CFLAGS, ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED])
+dnl Tries to compile with the given CFLAGS.
+dnl Runs ACTION-IF-ACCEPTED if the compiler can compile with the flags,
+dnl and ACTION-IF-NOT-ACCEPTED otherwise.
+
+AC_DEFUN([AS_COMPILER_FLAG],
+[
+ AC_MSG_CHECKING([to see if compiler understands $1])
+
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $1"
+
+ AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no])
+ CFLAGS="$save_CFLAGS"
+
+ if test "X$flag_ok" = Xyes ; then
+ m4_ifvaln([$2],[$2])
+ true
+ else
+ m4_ifvaln([$3],[$3])
+ true
+ fi
+ AC_MSG_RESULT([$flag_ok])
+])
+
+dnl AS_COMPILER_FLAGS(VAR, FLAGS)
+dnl Tries to compile with the given CFLAGS.
+
+AC_DEFUN([AS_COMPILER_FLAGS],
+[
+ list=$2
+ flags_supported=""
+ flags_unsupported=""
+ AC_MSG_CHECKING([for supported compiler flags])
+ for each in $list
+ do
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $each"
+ AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no])
+ CFLAGS="$save_CFLAGS"
+
+ if test "X$flag_ok" = Xyes ; then
+ flags_supported="$flags_supported $each"
+ else
+ flags_unsupported="$flags_unsupported $each"
+ fi
+ done
+ AC_MSG_RESULT([$flags_supported])
+ if test "X$flags_unsupported" != X ; then
+ AC_MSG_WARN([unsupported compiler flags: $flags_unsupported])
+ fi
+ $1="$$1 $flags_supported"
+])
+
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 9c9ac7b..7d3c354 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -32,7 +32,7 @@ EXTRA_DIST = $(TESTS_scripts) $(TESTS_scripts_M) $(scripts) $(IMAGES) $(common_f
CLEANFILES = $(EXTRA_PROGRAMS) single-tests.txt multi-tests.txt
-AM_CFLAGS = $(DRM_CFLAGS) $(CWARNFLAGS) \
+AM_CFLAGS = $(DRM_CFLAGS) $(CWARNFLAGS) $(DEBUG_CFLAGS)\
-I$(srcdir)/.. \
-I$(srcdir)/../lib \
-include "$(srcdir)/../lib/check-ndebug.h" \
--
2.1.0
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