diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac index 507dc9399f..77f45e2133 100644 --- a/configure.ac +++ b/configure.ac @@ -323,6 +323,11 @@ AC_ARG_ENABLE([external-signer], [use_external_signer=$enableval], [use_external_signer=yes]) +AC_ARG_ENABLE([lto], + [AS_HELP_STRING([--enable-lto],[build using LTO (default is no)])], + [enable_lto=$enableval], + [enable_lto=no]) + AC_LANG_PUSH([C++]) dnl Check for a flag to turn compiler warnings into errors. This is helpful for checks which may @@ -370,6 +375,11 @@ if test "x$enable_debug" = xyes; then AX_CHECK_COMPILE_FLAG([-ftrapv], [DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -ftrapv"], [], [$CXXFLAG_WERROR]) fi +if test "x$enable_lto" = "xyes"; 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 x$use_sanitizers != x; 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 @@ -1823,6 +1833,8 @@ 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) @@ -1938,6 +1950,7 @@ 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 = $TARGET_OS" echo " build os = $build_os" @@ -1946,7 +1959,7 @@ echo " CC = $CC" echo " CFLAGS = $PTHREAD_CFLAGS $CFLAGS" echo " CPPFLAGS = $DEBUG_CPPFLAGS $HARDENED_CPPFLAGS $CPPFLAGS" echo " CXX = $CXX" -echo " CXXFLAGS = $DEBUG_CXXFLAGS $HARDENED_CXXFLAGS $WARN_CXXFLAGS $NOWARN_CXXFLAGS $ERROR_CXXFLAGS $GPROF_CXXFLAGS $CXXFLAGS" -echo " LDFLAGS = $PTHREAD_LIBS $HARDENED_LDFLAGS $GPROF_LDFLAGS $LDFLAGS" +echo " CXXFLAGS = $LTO_CXXFLAGS $DEBUG_CXXFLAGS $HARDENED_CXXFLAGS $WARN_CXXFLAGS $NOWARN_CXXFLAGS $ERROR_CXXFLAGS $GPROF_CXXFLAGS $CXXFLAGS" +echo " LDFLAGS = $LTO_LDFLAGS $PTHREAD_LIBS $HARDENED_LDFLAGS $GPROF_LDFLAGS $LDFLAGS" echo " ARFLAGS = $ARFLAGS" echo |