From: Matthias Maier <tamiko@kyomu.43-1.org>
Date: Thu, 20 Jun 2013 17:46:10 +0000 (+0000)
Subject: CMake: Use -Og for debug builds with gcc if available
X-Git-Tag: v8.0.0~276
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5088f76490addb05ca973d84399a0cd11a5e8a3c;p=dealii.git

CMake: Use -Og for debug builds with gcc if available

git-svn-id: https://svn.dealii.org/trunk@29842 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/deal.II/cmake/setup_compiler_flags_gnu.cmake b/deal.II/cmake/setup_compiler_flags_gnu.cmake
index 0b35afc511..fdc33164cd 100644
--- a/deal.II/cmake/setup_compiler_flags_gnu.cmake
+++ b/deal.II/cmake/setup_compiler_flags_gnu.cmake
@@ -126,7 +126,13 @@ IF (CMAKE_BUILD_TYPE MATCHES "Debug")
   LIST(APPEND DEAL_II_DEFINITIONS_DEBUG "DEBUG")
   LIST(APPEND DEAL_II_USER_DEFINITIONS_DEBUG "DEBUG")
 
-  ADD_FLAGS(DEAL_II_CXX_FLAGS_DEBUG "-O0")
+  ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS_DEBUG "-Og")
+  #
+  # If -Og is not available, fall back to -O0:
+  #
+  IF(NOT DEAL_II_HAVE_FLAG_O0)
+    ADD_FLAGS(DEAL_II_CXX_FLAGS_DEBUG "-O0")
+  ENDIF()
 
   ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS_DEBUG "-ggdb")
   ENABLE_IF_SUPPORTED(DEAL_II_SHARED_LINKER_FLAGS_DEBUG "-ggdb")