From 5a83a50c47c46c54a443aa18ed6456416fa27a98 Mon Sep 17 00:00:00 2001
From: Etienne Carriere <etienne.carriere@linaro.org>
Date: Thu, 25 Apr 2019 10:19:05 +0200
Subject: [PATCH] regression 41xx: prevent unsafe-loop-optimizations build
 error
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Add -Wno-unsafe-loop-optimizations directive since regression_4100.c
fails to build on some recent toolchains as GCC 7.3.0 and 7.4.0 with
an error trace like below. Note building with GCC 8.2.1 does not
reproduce the build issue.

/path/to/optee_test/host/xtest/regression_4100.c: In function ‘convert_from_string’:
/path/to/optee_test/host/xtest/regression_4100.c:448:8: error: missed loop optimization, the loop counter may overflow [-Werror=unsafe-loop-optimizations]
  while (spos) {
        ^
/path/to/optee_test/host/xtest/regression_4100.c:455:6: error: missed loop optimization, the loop counter may overflow [-Werror=unsafe-loop-optimizations]
   if (!spos)
      ^

The GNU Makefile build sequence defines -Wno-unsafe-loop-optimizations
for the whole xtest sources while CMake build sequence defines it
specifically for regression_4100.c among xtest source files.

Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
---
 host/xtest/CMakeLists.txt | 4 ++++
 host/xtest/Makefile       | 1 +
 2 files changed, 5 insertions(+)

diff --git a/host/xtest/CMakeLists.txt b/host/xtest/CMakeLists.txt
index 1f3a6f4..3868bcd 100644
--- a/host/xtest/CMakeLists.txt
+++ b/host/xtest/CMakeLists.txt
@@ -61,6 +61,10 @@ set (SRC
 	xtest_test.c
 )
 
+set_source_files_properties(
+	regression_4100.c PROPERTIES COMPILE_FLAGS -Wno-unsafe-loop-optimizations
+)
+
 if (CFG_GP_SOCKETS)
 	list (APPEND SRC
 		regression_2000.c
diff --git a/host/xtest/Makefile b/host/xtest/Makefile
index f226500..e930d9c 100644
--- a/host/xtest/Makefile
+++ b/host/xtest/Makefile
@@ -155,6 +155,7 @@ CFLAGS += -Wall -Wcast-align -Werror \
 	  -Wshadow -Wstrict-prototypes -Wswitch-default \
 	  -Wwrite-strings \
 	  -Wno-declaration-after-statement \
+	  -Wno-unsafe-loop-optimizations \
 	  -Wno-missing-field-initializers -Wno-format-zero-length
 endif
 
-- 
2.17.1