[U-Boot] [PATCH v2] kconfig: add CONFIG_CC_COVERAGE

[Christian Gmeiner]

Make it possible to use gcc code coverage analysis.

v1 -> v2:
 - Kconfig: remove not needed 'default n'
 - Makefile: use consistent spacing

Signed-off-by: Christian Gmeiner <christian.gmeiner at gmail.com>
---
 .gitignore | 4 ++++
 Kconfig    | 7 +++++++
 Makefile   | 6 ++++++
 3 files changed, 17 insertions(+)

diff --git a/.gitignore b/.gitignore
index 29757aa51e..f1b801579c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -85,3 +85,7 @@ GTAGS
 *.orig
 *~
 \#*#
+
+# gcc code coverage files
+*.gcda
+*.gcno
diff --git a/Kconfig b/Kconfig
index 6670913799..67b8c50cbd 100644
--- a/Kconfig
+++ b/Kconfig
@@ -59,6 +59,13 @@ config CC_OPTIMIZE_FOR_SIZE
 
 	  This option is enabled by default for U-Boot.
 
+config CC_COVERAGE
+	bool "Enable code coverage analysis"
+	depends on SANDBOX
+	help
+	  Enabling this option will pass "--coverage" to gcc to compile
+	  and link code instrumented for coverage analysis.
+
 config DISTRO_DEFAULTS
 	bool "Select defaults suitable for booting general purpose Linux distributions"
 	default y if ARCH_SUNXI || TEGRA
diff --git a/Makefile b/Makefile
index 5fa14789d9..5ca695650d 100644
--- a/Makefile
+++ b/Makefile
@@ -720,6 +720,12 @@ else
 PLATFORM_LIBGCC := -L $(shell dirname `$(CC) $(c_flags) -print-libgcc-file-name`) -lgcc
 endif
 PLATFORM_LIBS += $(PLATFORM_LIBGCC)
+
+ifdef CONFIG_CC_COVERAGE
+KBUILD_CFLAGS += --coverage
+PLATFORM_LIBGCC += -lgcov
+endif
+
 export PLATFORM_LIBS
 export PLATFORM_LIBGCC
 
-- 
2.14.3