cmake: add definitions for glibc

"-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64" is not for gcc, it's for glibc
actually. so enable it on LINUX.

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 739d1485178c7b1ef55b9ef7679cb9428c14fa2a..00aef846709fea290b6629359e77a4831668d90b 100644 (file)
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -18,12 +18,15 @@ set(prefix ${CMAKE_INSTALL_PREFIX})
 add_definitions("-DCEPH_LIBDIR=\"${CMAKE_INSTALL_FULL_LIBDIR}\"")
 add_definitions("-DCEPH_PKGLIBDIR=\"${CMAKE_INSTALL_FULL_PKGLIBDIR}\"")
 add_definitions("-DHAVE_CONFIG_H -D__CEPH__ -D_REENTRANT -D_THREAD_SAFE -D__STDC_FORMAT_MACROS")
+if(LINUX)
+  add_definitions("-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64")
+endif()
 
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wtype-limits -Wignored-qualifiers -Winit-self")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wpointer-arith -Werror=format-security -fno-strict-aliasing -fsigned-char")
 
+
 if(CMAKE_CXX_COMPILER_ID STREQUAL GNU)
-  add_definitions("-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -rdynamic")
   set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pie")
 elseif(CMAKE_CXX_COMPILER_ID STREQUAL Clang)