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Make --enable-debug to pick better options 

Various changes:

 * Don't check $GCC and $GXX
 * Prefer -Og instead of -O0
 * If -g3 isn't available, use -g

This also incidentally fixes compiler warnings with GCC and glibc when using
--enable-debug, as the old default values mixed poorly with the hardening flags.
This commit is contained in:
Evan Klitzke 2018-03-15 05:05:48 -07:00 committed by practicalswift
parent 07825088f9
commit 9e49db2426
2 changed files with 22 additions and 12 deletions
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30
configure.ac
View File

@ -243,14 +243,22 @@ AC_LANG_PUSH([C++])
AX_CHECK_COMPILE_FLAG([-Werror],[CXXFLAG_WERROR="-Werror"],[CXXFLAG_WERROR=""])
if test "x$enable_debug" = xyes; then
CPPFLAGS="$CPPFLAGS -DDEBUG -DDEBUG_LOCKORDER"
if test "x$GCC" = xyes; then
CFLAGS="$CFLAGS -g3 -O0"
fi
# Prefer -Og, fall back to -O0 if that is unavailable.
AX_CHECK_COMPILE_FLAG(
[-Og],
[[DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -Og"]],
[AX_CHECK_COMPILE_FLAG([-O0],[[DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -O0"]],,[[$CXXFLAG_WERROR]])],
[[$CXXFLAG_WERROR]])
if test "x$GXX" = xyes; then
CXXFLAGS="$CXXFLAGS -g3 -O0"
fi
# Prefer -g3, fall back to -g if that is unavailable.
AX_CHECK_COMPILE_FLAG(
[-g3],
[[DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -g3"]],
[AX_CHECK_COMPILE_FLAG([-g],[[DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -g"]],,[[$CXXFLAG_WERROR]])],
[[$CXXFLAG_WERROR]])
AX_CHECK_PREPROC_FLAG([-DDEBUG],[[DEBUG_CPPFLAGS="$DEBUG_CPPFLAGS -DDEBUG"]],,[[$CXXFLAG_WERROR]])
AX_CHECK_PREPROC_FLAG([-DDEBUG_LOCKORDER],[[DEBUG_CPPFLAGS="$DEBUG_CPPFLAGS -DDEBUG_LOCKORDER"]],,[[$CXXFLAG_WERROR]])
fi
if test x$use_sanitizers != x; then
@ -1276,6 +1284,8 @@ AC_SUBST(BITCOIN_CLI_NAME)
AC_SUBST(BITCOIN_TX_NAME)
AC_SUBST(RELDFLAGS)
AC_SUBST(DEBUG_CPPFLAGS)
AC_SUBST(DEBUG_CXXFLAGS)
AC_SUBST(ERROR_CXXFLAGS)
AC_SUBST(GPROF_CXXFLAGS)
AC_SUBST(GPROF_LDFLAGS)
@ -1383,9 +1393,9 @@ echo " build os = $BUILD_OS"
echo
echo " CC = $CC"
echo " CFLAGS = $CFLAGS"
echo " CPPFLAGS = $CPPFLAGS"
echo " CPPFLAGS = $DEBUG_CPPFLAGS $HARDENED_CPPFLAGS $CPPFLAGS"
echo " CXX = $CXX"
echo " CXXFLAGS = $CXXFLAGS"
echo " LDFLAGS = $LDFLAGS"
echo " CXXFLAGS = $DEBUG_CXXFLAGS $HARDENED_CXXFLAGS $ERROR_CXXFLAGS $GPROF_CXXFLAGS $CXXFLAGS"
echo " LDFLAGS = $PTHREAD_CFLAGS $HARDENED_LDFLAGS $GPROF_LDFLAGS $LDFLAGS"
echo " ARFLAGS = $ARFLAGS"
echo

4
src/Makefile.am
View File

@ -5,8 +5,8 @@
DIST_SUBDIRS = secp256k1 univalue
AM_LDFLAGS = $(PTHREAD_CFLAGS) $(LIBTOOL_LDFLAGS) $(HARDENED_LDFLAGS) $(GPROF_LDFLAGS) $(SANITIZER_LDFLAGS)
AM_CXXFLAGS = $(HARDENED_CXXFLAGS) $(ERROR_CXXFLAGS) $(GPROF_CXXFLAGS) $(SANITIZER_CXXFLAGS)
AM_CPPFLAGS = $(HARDENED_CPPFLAGS)
AM_CXXFLAGS = $(DEBUG_CXXFLAGS) $(HARDENED_CXXFLAGS) $(ERROR_CXXFLAGS) $(GPROF_CXXFLAGS) $(SANITIZER_CXXFLAGS)
AM_CPPFLAGS = $(DEBUG_CPPFLAGS) $(HARDENED_CPPFLAGS)
AM_LIBTOOLFLAGS = --preserve-dup-deps
EXTRA_LIBRARIES =