[reactos] 12/19: [EXT2FS] Use GNU89 standard when using CLang

[Jérôme Gardou]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=f424d524882efbd06e85a…

commit f424d524882efbd06e85aad1e36fbd7aa8bb60ce
Author:     Jérôme Gardou <jerome.gardou(a)reactos.org>
AuthorDate: Mon Nov 9 13:28:34 2020 +0100
Commit:     Jérôme Gardou <zefklop(a)users.noreply.github.com>
CommitDate: Mon Nov 16 16:58:10 2020 +0100

    [EXT2FS] Use GNU89 standard when using CLang
---
 drivers/filesystems/ext2/CMakeLists.txt | 31 ++++++++++++++++++++-----------
 1 file changed, 20 insertions(+), 11 deletions(-)

diff --git a/drivers/filesystems/ext2/CMakeLists.txt
b/drivers/filesystems/ext2/CMakeLists.txt
index 38851437730..dbd8cc84925 100644
--- a/drivers/filesystems/ext2/CMakeLists.txt
+++ b/drivers/filesystems/ext2/CMakeLists.txt
@@ -92,23 +92,32 @@ if(USE_CLANG_CL)
     set_property(SOURCE src/create.c src/fileinfo.c src/memory.c src/read.c APPEND_STRING
PROPERTY COMPILE_FLAGS " /fallback")
 endif()
 
-if(MSVC AND (NOT USE_CLANG_CL))
+if(MSVC)
     # Disable warnings: "unreferenced local variable", "initialized, but
not used variable", "benign include"
-    remove_target_compile_option(ext2fs "/we4101")
-    remove_target_compile_option(ext2fs "/we4189")
-    target_compile_options(ext2fs PRIVATE /wd4189 /wd4142 /wd4101)
+    if (NOT CLANG)
+        remove_target_compile_option(ext2fs "/we4101")
+        remove_target_compile_option(ext2fs "/we4189")
+        target_compile_options(ext2fs PRIVATE /wd4189 /wd4142 /wd4101)
+    endif()
 else()
-    target_compile_options(ext2fs PRIVATE -Wno-pointer-sign -Wno-unused-function)
-    target_compile_options(ext2fs PRIVATE -Wno-unused-variable -Wno-missing-braces)
-    if(USE_CLANG_CL)
-        target_compile_options(ext2fs PRIVATE -Wno-unused-value
-Wno-parentheses-equality)
-        target_compile_options(ext2fs PRIVATE
-Wno-incompatible-pointer-types-discards-qualifiers)
-        target_compile_options(ext2fs PRIVATE
"-Wno-#pragma-messages;-Wno-cast-calling-convention")
-    else()
+    target_compile_options(ext2fs PRIVATE
+        -Wno-pointer-sign -Wno-unused-function
+        -Wno-unused-variable -Wno-missing-braces)
+    if (NOT CLANG)
         target_compile_options(ext2fs PRIVATE -Wno-unused-but-set-variable)
     endif()
 endif()
 
+if(CLANG)
+    target_compile_options(ext2fs PRIVATE
+        -Wno-unused-value -Wno-parentheses-equality
+        -Wno-incompatible-pointer-types-discards-qualifiers
+        "-Wno-#pragma-messages;-Wno-cast-calling-convention")
+    if (GCC)
+        target_compile_options(ext2fs PRIVATE -std=gnu89)
+    endif()
+endif()
+
 target_link_libraries(ext2fs memcmp ${PSEH_LIB})
 add_definitions(-D__KERNEL__ -D_CRT_NO_POSIX_ERROR_CODES)
 set_module_type(ext2fs kernelmodedriver)