[PATCH v5 6/9] CryptoPkg: Fix possible build problem with Clang

["Xiaoyu Lu" <xiaoyux.lu@intel.com>]

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1089

When building CryptoPkg with Clang, blow error may result

* /usr/lib/llvm-3.8/lib/clang/3.8.0/include/stdatomic.h:105:17: error:
    unknown type name 'wchar_t'

Since the C native atomics are C11 feature we can explicitly
use C99 to work around it.
add -std=c99 to avoid it

* openssl/crypto/conf/conf_sap.c:71:12: error: variable 'ret' is
  uninitialized
  when used here [-Werror,-Wuninitialized]

Suppress warnings in OpenSSL so we don't break the build with -Werror.
add -Wno-error=uninitialized to disalbe this warning

Cc: Ting Ye <ting.ye@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Signed-off-by: Xiaoyu Lu <xiaoyux.lu@intel.com>
---
 CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf    | 2 ++
 CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf     | 2 ++
 CryptoPkg/Library/BaseCryptLib/RuntimeCryptLib.inf | 2 ++
 CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf     | 2 ++
 CryptoPkg/Library/OpensslLib/OpensslLib.inf        | 1 +
 CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf  | 1 +
 6 files changed, 10 insertions(+)

diff --git a/CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf b/CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf
index 38e25372b4b0..2a581ceac70c 100644
--- a/CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf
+++ b/CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf
@@ -96,3 +96,5 @@ [BuildOptions]
   # -JCryptoPkg/Include : To disable the use of the system includes provided by RVCT
   # --diag_remark=1     : Reduce severity of "#1-D: last line of file ends without a newline"
   RVCT:*_*_ARM_CC_FLAGS = -JCryptoPkg/Include --diag_remark=1
+
+  GCC:*_CLANG38_*_CC_FLAGS = -std=c99
diff --git a/CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf b/CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf
index 415dda3078a8..8fdc6920ec2e 100644
--- a/CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf
+++ b/CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf
@@ -93,3 +93,5 @@ [BuildOptions]
   # -JCryptoPkg/Include : To disable the use of the system includes provided by RVCT
   # --diag_remark=1     : Reduce severity of "#1-D: last line of file ends without a newline"
   RVCT:*_*_ARM_CC_FLAGS = -JCryptoPkg/Include --diag_remark=1
+
+  GCC:*_CLANG38_*_CC_FLAGS = -std=c99
diff --git a/CryptoPkg/Library/BaseCryptLib/RuntimeCryptLib.inf b/CryptoPkg/Library/BaseCryptLib/RuntimeCryptLib.inf
index 5da5b31947bd..9d639fd01eae 100644
--- a/CryptoPkg/Library/BaseCryptLib/RuntimeCryptLib.inf
+++ b/CryptoPkg/Library/BaseCryptLib/RuntimeCryptLib.inf
@@ -101,3 +101,5 @@ [BuildOptions]
   # -JCryptoPkg/Include : To disable the use of the system includes provided by RVCT
   # --diag_remark=1     : Reduce severity of "#1-D: last line of file ends without a newline"
   RVCT:*_*_ARM_CC_FLAGS = -JCryptoPkg/Include --diag_remark=1
+
+  GCC:*_CLANG38_*_CC_FLAGS = -std=c99
diff --git a/CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf b/CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf
index f5dd213d1ba1..c9f4abb22aea 100644
--- a/CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf
+++ b/CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf
@@ -98,3 +98,5 @@ [BuildOptions]
   MSFT:*_*_*_CC_FLAGS = /wd4090
 
   XCODE:*_*_*_CC_FLAGS = -mmmx -msse
+
+  GCC:*_CLANG38_*_CC_FLAGS = -std=c99
diff --git a/CryptoPkg/Library/OpensslLib/OpensslLib.inf b/CryptoPkg/Library/OpensslLib/OpensslLib.inf
index f4d7772c068c..ce04d441552f 100644
--- a/CryptoPkg/Library/OpensslLib/OpensslLib.inf
+++ b/CryptoPkg/Library/OpensslLib/OpensslLib.inf
@@ -559,6 +559,7 @@ [BuildOptions]
   GCC:*_*_X64_CC_FLAGS     = -U_WIN32 -U_WIN64 $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-error=format -Wno-format -Wno-error=unused-but-set-variable -DNO_MSABI_VA_FUNCS
   GCC:*_*_ARM_CC_FLAGS     = $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-error=unused-but-set-variable
   GCC:*_*_AARCH64_CC_FLAGS = $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-format -Wno-error=unused-but-set-variable
+  GCC:*_CLANG38_*_CC_FLAGS = -std=c99 -Wno-error=uninitialized
 
   # suppress the following warnings in openssl so we don't break the build with warnings-as-errors:
   # 1295: Deprecated declaration <entity> - give arg types
diff --git a/CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf b/CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf
index fd12d112edb2..35430e77d344 100644
--- a/CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf
+++ b/CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf
@@ -520,6 +520,7 @@ [BuildOptions]
   GCC:*_*_X64_CC_FLAGS     = -U_WIN32 -U_WIN64 $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-error=format -Wno-format -Wno-error=unused-but-set-variable -DNO_MSABI_VA_FUNCS
   GCC:*_*_ARM_CC_FLAGS     = $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-error=unused-but-set-variable
   GCC:*_*_AARCH64_CC_FLAGS = $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-format -Wno-error=unused-but-set-variable
+  GCC:*_CLANG38_*_CC_FLAGS = -std=c99 -Wno-error=uninitialized
 
   # suppress the following warnings in openssl so we don't break the build with warnings-as-errors:
   # 1295: Deprecated declaration <entity> - give arg types
-- 
2.7.4