From 3b3811b16537c302f2218069dfce9611e15e3bd5 Mon Sep 17 00:00:00 2001 From: John Szakmeister Date: Wed, 25 Jun 2014 06:33:36 -0400 Subject: Fix #867: cmake doesn't issue `-isystem` for versioned gcc CMake purposefully disables the use of the `-isystem` flag on Apple platforms, but it's overly blunt with the detection. Apple's compilers have supported the flag since at least 10.4. Let's force the switch to be on when gcc/g++ is detected on an Apple platform to reduce the warnings out of the msgpack-related bits. --- CMakeLists.txt | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/CMakeLists.txt b/CMakeLists.txt index 3235d0e942..6ad0af4cea 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -18,6 +18,17 @@ set(NEOVIM_VERSION_PATCH 0) set(CMAKE_EXPORT_COMPILE_COMMANDS ON) +# Work around some old, broken detection by CMake for knowing when to use the +# isystem flag. Apple's compilers have supported this for quite some time now. +if(APPLE) + if(CMAKE_COMPILER_IS_GNUCC) + set(CMAKE_INCLUDE_SYSTEM_FLAG_C "-isystem ") + endif() + if(CMAKE_COMPILER_IS_GNUCXX) + set(CMAKE_INCLUDE_SYSTEM_FLAG_CXX "-isystem ") + endif() +endif() + add_definitions(-Wall -Wextra -pedantic -Wno-unused-parameter -std=gnu99) option( -- cgit