+# expose required -std option via pkg-config
+PKG_CXXFLAGS=$STD
+
+# See if -Wunknown-warning-option is supported
+AC_MSG_CHECKING(
+ [whether -Wunknown-warning-option is supported])
+AC_CACHE_VAL([folly_cv_cxx_unknown_warning_option_support], [
+ folly_save_CXXFLAGS="$CXXFLAGS"
+ CXXFLAGS="$CXXFLAGS -Werror=unknown-warning-option"
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[]], [[]])],
+ [
+ # The compiler didn't completely error out on -Werror=unknown-warning-option
+ CXXFLAGS="$CXXFLAGS -Werror=unknown-warning-option -Wthis-is-an-unknown-option-that-should-error"
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[]], [[]])],
+ [folly_cv_cxx_unknown_warning_option_support=no],
+ [folly_cv_cxx_unknown_warning_option_support=yes])
+ ],
+ [folly_cv_cxx_unknown_warning_option_support=no])
+ CXXFLAGS="$folly_save_CXXFLAGS"])
+AC_MSG_RESULT([$folly_cv_cxx_unknown_warning_option_support])
+
+# See if -Wshadow-local and -Wshadow-compatible-local are supported
+AC_MSG_CHECKING(
+ [whether -Wshadow-local and -Wshadow-compatible-local are supported])
+AC_CACHE_VAL([folly_cv_cxx_shadow_local_support], [
+ folly_save_CXXFLAGS="$CXXFLAGS"
+ CXXFLAGS="$CXXFLAGS -Wshadow-local -Wshadow-compatible-local"
+ if test "$folly_cv_cxx_unknown_warning_option_support" = yes; then
+ CXXFLAGS="$CXXFLAGS -Werror=unknown-warning-option"
+ fi
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[]], [[]])],
+ [folly_cv_cxx_shadow_local_support=yes],
+ [folly_cv_cxx_shadow_local_support=no])
+ CXXFLAGS="$folly_save_CXXFLAGS"])
+AC_MSG_RESULT([$folly_cv_cxx_shadow_local_support])
+if test "$folly_cv_cxx_shadow_local_support" = yes; then
+ AC_DEFINE([HAVE_SHADOW_LOCAL_WARNINGS], [1],
+ [Define if both -Wshadow-local and -Wshadow-compatible-local are supported.])
+fi
+
+# Checks for glog and gflags
+# There are no symbols with C linkage, so we do a try-run
+AC_HAVE_LIBRARY([gflags],[],[AC_MSG_ERROR(
+ [Please install google-gflags library])])
+AC_CACHE_CHECK(
+ [for gflags viability],
+ [folly_cv_prog_cc_gflags],
+ [AC_RUN_IFELSE(
+ [AC_LANG_SOURCE[
+ #include <gflags/gflags.h>
+ DEFINE_bool(folly_truthy, true, "Sample truthy flag");
+ DEFINE_bool(folly_falsey, false, "Sample falsey flag");
+ int main(int argc, char** argv) {
+ return (FLAGS_folly_truthy && !FLAGS_folly_falsey) ? 0 : 1;
+ }
+ ]],
+ [folly_cv_prog_cc_gflags=yes],
+ [folly_cv_prog_cc_gflags=no]
+ )]
+)
+
+if test "$folly_cv_prog_cc_gflags" != "yes"; then
+ AC_MSG_ERROR(["gflags invalid, see config.log for details"])
+fi
+FB_CHECK_PKG_CONFIG([GFLAGS], [gflags])
+
+AC_HAVE_LIBRARY([glog],[],[AC_MSG_ERROR(
+ [Please install google-glog library])])
+AC_CACHE_CHECK(
+ [for glog viability],
+ [folly_cv_prog_cc_glog],
+ [AC_RUN_IFELSE(
+ [AC_LANG_SOURCE[
+ #include <glog/logging.h>
+ int main(int argc, char** argv) {
+ google::InitGoogleLogging(argv[0]);
+ google::ShutdownGoogleLogging();
+ return 0;
+ }
+ ]],
+ [folly_cv_prog_cc_glog=yes],
+ [folly_cv_prog_cc_glog=no]
+ )]
+)
+
+if test "$folly_cv_prog_cc_glog" != "yes"; then
+ AC_MSG_ERROR(["libglog invalid, see config.log for details"])
+fi
+FB_CHECK_PKG_CONFIG([GLOG], [libglog])
+
+AS_IF(
+ [test "x$OPENSSL_INCLUDES" = "x"],
+ [
+ AX_CHECK_OPENSSL([], [AC_MSG_ERROR(["Error: libssl required"])])
+ ],
+ [
+ # AX_CHECK_OPENSSL doesn't seem to play nice with builds started
+ # via build/bootstrap-osx-homebrew.sh
+ AC_MSG_WARN(["Using existing OpenSSL flags from environment."])
+ PKG_CXXFLAGS="$PKG_CXXFLAGS $OPENSSL_INCLUDES"
+ ]
+)
+FB_CHECK_PKG_CONFIG([OPENSSL], [openssl])