Update buildroot v2020.02.4 (#811)

* Update buildroot to 2020.02.4

Signed-off-by: Pascal Vizeli <pvizeli@syshack.ch>

* fix patches

Signed-off-by: Pascal Vizeli <pvizeli@syshack.ch>

buildroot/toolchain/helpers.mk

@@ -184,7 +184,7 @@ check_gcc_version = \
 		exit 0 ; \
 	fi; \
 	real_version=`$(1) -dumpversion` ; \
-	if [[ ! "$${real_version}" =~ ^$${expected_version}\. ]] ; then \
+	if [[ ! "$${real_version}." =~ ^$${expected_version}\. ]] ; then \
 		printf "Incorrect selection of gcc version: expected %s.x, got %s\n" \
 			"$${expected_version}" "$${real_version}" ; \
 		exit 1 ; \

buildroot/toolchain/toolchain-wrapper.c

@@ -177,6 +177,7 @@ static void check_unsafe_path(const char *arg,
 	}
 }
 
+#ifdef BR_NEED_SOURCE_DATE_EPOCH
 /* Returns false if SOURCE_DATE_EPOCH was not defined in the environment.
  *
  * Returns true if SOURCE_DATE_EPOCH is in the environment and represent
@@ -230,6 +231,15 @@ bool parse_source_date_epoch_from_env(void)
 	}
 	return true;
 }
+#else
+bool parse_source_date_epoch_from_env(void)
+{
+	/* The compiler is recent enough to handle SOURCE_DATE_EPOCH itself
+	 * so we do not need to do anything here.
+	 */
+	return false;
+}
+#endif
 
 int main(int argc, char **argv)
 {

buildroot/toolchain/toolchain-wrapper.mk

@@ -28,6 +28,9 @@ TOOLCHAIN_WRAPPER_OPTS += -ffile-prefix-map=$(BASE_DIR)=buildroot
 else
 TOOLCHAIN_WRAPPER_OPTS += -D__FILE__=\"\" -D__BASE_FILE__=\"\" -Wno-builtin-macro-redefined
 endif
+ifeq ($(BR2_TOOLCHAIN_GCC_AT_LEAST_7),)
+TOOLCHAIN_WRAPPER_OPTS += -DBR_NEED_SOURCE_DATE_EPOCH
+endif
 endif
 
 # We create a list like '"-mfoo", "-mbar", "-mbarfoo"' so that each flag is a