[PATCH] version: Move version_string[] from version.h to version_string.h

[Pali Rohár]

More C files do not use compile time timestamp macros and do not have to be
recompiled every time when SOURCE_DATE_EPOCH changes.

This patch moves version_string[] from version.h to version_string.h and
updates other C files which only needs version_string[] string to include
version_string.h instead of version.h. After applying this patch these
files are not recompiled every time when SOURCE_DATE_EPOCH changes.

Signed-off-by: Pali Rohár <pali at kernel.org>
---
 board/ge/b1x5v2/b1x5v2.c    | 2 +-
 board/ge/bx50v3/bx50v3.c    | 2 +-
 board/ge/mx53ppd/mx53ppd.c  | 2 +-
 cmd/version.c               | 1 +
 common/main.c               | 2 +-
 drivers/video/cfb_console.c | 3 +--
 include/version.h           | 3 ---
 include/version_string.h    | 8 ++++++++
 lib/display_options.c       | 2 +-
 test/print_ut.c             | 2 +-
 10 files changed, 16 insertions(+), 11 deletions(-)
 create mode 100644 include/version_string.h

diff --git a/board/ge/b1x5v2/b1x5v2.c b/board/ge/b1x5v2/b1x5v2.c
index 1cb347fd9e..18ba5c9e71 100644
--- a/board/ge/b1x5v2/b1x5v2.c
+++ b/board/ge/b1x5v2/b1x5v2.c
@@ -29,7 +29,7 @@
 #include <panel.h>
 #include <rtc.h>
 #include <spi_flash.h>
-#include <version.h>
+#include <version_string.h>
 
 #include "../common/vpd_reader.h"
 
diff --git a/board/ge/bx50v3/bx50v3.c b/board/ge/bx50v3/bx50v3.c
index 3ea9425fd1..faad9cef72 100644
--- a/board/ge/bx50v3/bx50v3.c
+++ b/board/ge/bx50v3/bx50v3.c
@@ -32,7 +32,7 @@
 #include <power/da9063_pmic.h>
 #include <input.h>
 #include <pwm.h>
-#include <version.h>
+#include <version_string.h>
 #include <stdlib.h>
 #include <dm/root.h>
 #include "../common/ge_rtc.h"
diff --git a/board/ge/mx53ppd/mx53ppd.c b/board/ge/mx53ppd/mx53ppd.c
index ef689733c4..9a76cdc388 100644
--- a/board/ge/mx53ppd/mx53ppd.c
+++ b/board/ge/mx53ppd/mx53ppd.c
@@ -32,7 +32,7 @@
 #include <fsl_pmic.h>
 #include <linux/fb.h>
 #include <ipu_pixfmt.h>
-#include <version.h>
+#include <version_string.h>
 #include <watchdog.h>
 #include "ppd_gpio.h"
 #include <stdlib.h>
diff --git a/cmd/version.c b/cmd/version.c
index 3686b87332..b183cc8b63 100644
--- a/cmd/version.c
+++ b/cmd/version.c
@@ -7,6 +7,7 @@
 #include <common.h>
 #include <command.h>
 #include <version.h>
+#include <version_string.h>
 #include <linux/compiler.h>
 #ifdef CONFIG_SYS_COREBOOT
 #include <asm/arch/sysinfo.h>
diff --git a/common/main.c b/common/main.c
index ae5bcdb32f..3f5214fd44 100644
--- a/common/main.c
+++ b/common/main.c
@@ -15,7 +15,7 @@
 #include <env.h>
 #include <init.h>
 #include <net.h>
-#include <version.h>
+#include <version_string.h>
 #include <efi_loader.h>
 
 static void run_preboot_environment_command(void)
diff --git a/drivers/video/cfb_console.c b/drivers/video/cfb_console.c
index 3f07f4eb29..1a471ce07b 100644
--- a/drivers/video/cfb_console.c
+++ b/drivers/video/cfb_console.c
@@ -71,7 +71,7 @@
 #include <fdtdec.h>
 #include <gzip.h>
 #include <log.h>
-#include <version.h>
+#include <version_string.h>
 #include <malloc.h>
 #include <video.h>
 #include <linux/compiler.h>
@@ -121,7 +121,6 @@
  * Console device
  */
 
-#include <version.h>
 #include <linux/types.h>
 #include <stdio_dev.h>
 #include <video_font.h>
diff --git a/include/version.h b/include/version.h
index 2d24451569..0a3b29adb8 100644
--- a/include/version.h
+++ b/include/version.h
@@ -16,7 +16,4 @@
 #define U_BOOT_VERSION_STRING U_BOOT_VERSION " (" U_BOOT_DATE " - " \
 	U_BOOT_TIME " " U_BOOT_TZ ")" CONFIG_IDENT_STRING
 
-#ifndef __ASSEMBLY__
-extern const char version_string[];
-#endif	/* __ASSEMBLY__ */
 #endif	/* __VERSION_H__ */
diff --git a/include/version_string.h b/include/version_string.h
new file mode 100644
index 0000000000..a89a6e4370
--- /dev/null
+++ b/include/version_string.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef	__VERSION_STRING_H__
+#define	__VERSION_STRING_H__
+
+extern const char version_string[];
+
+#endif	/* __VERSION_STRING_H__ */
diff --git a/lib/display_options.c b/lib/display_options.c
index b2025eeb5c..1b069761f8 100644
--- a/lib/display_options.c
+++ b/lib/display_options.c
@@ -8,7 +8,7 @@
 #include <compiler.h>
 #include <console.h>
 #include <div64.h>
-#include <version.h>
+#include <version_string.h>
 #include <linux/ctype.h>
 #include <asm/io.h>
 
diff --git a/test/print_ut.c b/test/print_ut.c
index a456a449ef..ae1cf85f1c 100644
--- a/test/print_ut.c
+++ b/test/print_ut.c
@@ -12,7 +12,7 @@
 #endif
 #include <display_options.h>
 #include <log.h>
-#include <version.h>
+#include <version_string.h>
 
 #define FAKE_BUILD_TAG	"jenkins-u-boot-denx_uboot_dm-master-build-aarch64" \
 			"and a lot more text to come"
-- 
2.20.1