diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 40 |
1 files changed, 12 insertions, 28 deletions
diff --git a/configure.ac b/configure.ac index 38c8a94ae8..50e6870dd9 100644 --- a/configure.ac +++ b/configure.ac @@ -321,13 +321,17 @@ AC_ARG_ENABLE([external-signer], [use_external_signer=$enableval], [use_external_signer=auto]) -AC_ARG_ENABLE([lto], - [AS_HELP_STRING([--enable-lto],[build using LTO (default is no)])], - [enable_lto=$enableval], - [enable_lto=no]) - AC_LANG_PUSH([C++]) +dnl Always set -g -O2 in our CXXFLAGS. Autoconf will try and set CXXFLAGS to "-g -O2" by default, +dnl so we suppress that (if CXXFLAGS hasn't been overridden by the user), given we are adding it +dnl ourselves. +CORE_CXXFLAGS="$CORE_CXXFLAGS -g -O2" + +if test "$CXXFLAGS_overridden" = "no"; then + CXXFLAGS="" +fi + dnl Check for a flag to turn compiler warnings into errors. This is helpful for checks which may dnl appear to succeed because by default they merely emit warnings when they fail. dnl @@ -352,12 +356,6 @@ case $host in esac if test "$enable_debug" = "yes"; then - dnl If debugging is enabled, and the user hasn't overridden CXXFLAGS, clear - dnl them, to prevent autoconfs "-g -O2" being added. Otherwise we'd end up - dnl with "-O0 -g3 -g -O2". - if test "$CXXFLAGS_overridden" = "no"; then - CXXFLAGS="" - fi dnl Disable all optimizations AX_CHECK_COMPILE_FLAG([-O0], [DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -O0"], [], [$CXXFLAG_WERROR]) @@ -377,11 +375,6 @@ if test "$enable_debug" = "yes"; then AX_CHECK_COMPILE_FLAG([-ftrapv], [DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -ftrapv"], [], [$CXXFLAG_WERROR]) fi -if test "$enable_lto" = "yes"; then - AX_CHECK_COMPILE_FLAG([-flto], [LTO_CXXFLAGS="$LTO_CXXFLAGS -flto"], [AC_MSG_ERROR([compile failed with -flto])], [$CXXFLAG_WERROR]) - AX_CHECK_LINK_FLAG([-flto], [LTO_LDFLAGS="$LTO_LDFLAGS -flto"], [AC_MSG_ERROR([link failed with -flto])], [$CXXFLAG_WERROR]) -fi - if test "$use_sanitizers" != ""; then dnl First check if the compiler accepts flags. If an incompatible pair like dnl -fsanitize=address,thread is used here, this check will fail. This will also @@ -870,13 +863,7 @@ if test "$use_lcov" = "yes"; then [AC_MSG_ERROR([lcov testing requested but --coverage linker flag does not work])]) AX_CHECK_COMPILE_FLAG([--coverage],[CORE_CXXFLAGS="$CORE_CXXFLAGS --coverage"], [AC_MSG_ERROR([lcov testing requested but --coverage flag does not work])]) - dnl If coverage is enabled, and the user hasn't overridden CXXFLAGS, clear - dnl them, to prevent autoconfs "-g -O2" being added. Otherwise we'd end up - dnl with "--coverage -Og -O0 -g -O2". - if test "$CXXFLAGS_overridden" = "no"; then - CXXFLAGS="" - fi - CORE_CXXFLAGS="$CORE_CXXFLAGS -Og -O0" + CORE_CXXFLAGS="$CORE_CXXFLAGS -Og" fi if test "$use_lcov_branch" != "no"; then @@ -1892,8 +1879,6 @@ AC_SUBST(GPROF_LDFLAGS) AC_SUBST(HARDENED_CXXFLAGS) AC_SUBST(HARDENED_CPPFLAGS) AC_SUBST(HARDENED_LDFLAGS) -AC_SUBST(LTO_CXXFLAGS) -AC_SUBST(LTO_LDFLAGS) AC_SUBST(PIC_FLAGS) AC_SUBST(PIE_FLAGS) AC_SUBST(SANITIZER_CXXFLAGS) @@ -2004,7 +1989,6 @@ echo " sanitizers = $use_sanitizers" echo " debug enabled = $enable_debug" echo " gprof enabled = $enable_gprof" echo " werror = $enable_werror" -echo " LTO = $enable_lto" echo echo " target os = $host_os" echo " build os = $build_os" @@ -2013,8 +1997,8 @@ echo " CC = $CC" echo " CFLAGS = $PTHREAD_CFLAGS $SANITIZER_CFLAGS $CFLAGS" echo " CPPFLAGS = $DEBUG_CPPFLAGS $HARDENED_CPPFLAGS $CORE_CPPFLAGS $CPPFLAGS" echo " CXX = $CXX" -echo " CXXFLAGS = $LTO_CXXFLAGS $DEBUG_CXXFLAGS $HARDENED_CXXFLAGS $WARN_CXXFLAGS $NOWARN_CXXFLAGS $ERROR_CXXFLAGS $GPROF_CXXFLAGS $CORE_CXXFLAGS $CXXFLAGS" -echo " LDFLAGS = $LTO_LDFLAGS $PTHREAD_LIBS $HARDENED_LDFLAGS $GPROF_LDFLAGS $CORE_LDFLAGS $LDFLAGS" +echo " CXXFLAGS = $CORE_CXXFLAGS $DEBUG_CXXFLAGS $HARDENED_CXXFLAGS $WARN_CXXFLAGS $NOWARN_CXXFLAGS $ERROR_CXXFLAGS $GPROF_CXXFLAGS $SANITIZER_CXXFLAGS $CXXFLAGS" +echo " LDFLAGS = $PTHREAD_LIBS $HARDENED_LDFLAGS $GPROF_LDFLAGS $SANITIZER_LDFLAGS $CORE_LDFLAGS $LDFLAGS" echo " AR = $AR" echo " ARFLAGS = $ARFLAGS" echo |