[PULL 21/21] build: Add update-linux-vdso makefile rule

[Richard Henderson]

This is not ideal, since it requires all cross-compilers
to be present rather than a simple subset.  But since it
is only run manually, should be good enough for now.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 Makefile | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Makefile b/Makefile
index bfc4b2c8e9..676a4a54f4 100644
--- a/Makefile
+++ b/Makefile
@@ -283,6 +283,13 @@ include $(SRC_PATH)/tests/vm/Makefile.include
 print-help-run = printf "  %-30s - %s\\n" "$1" "$2"
 print-help = @$(call print-help-run,$1,$2)
 
+.PHONY: update-linux-vdso
+update-linux-vdso:
+       @for m in $(SRC_PATH)/linux-user/*/Makefile.vdso; do \
+         $(MAKE) $(SUBDIR_MAKEFLAGS) -C $$(dirname $$m) -f Makefile.vdso \
+               SRC_PATH=$(SRC_PATH) BUILD_DIR=$(BUILD_DIR); \
+       done
+
 .PHONY: help
 help:
        @echo  'Generic targets:'
@@ -303,6 +310,9 @@ endif
        $(call print-help,distclean,Remove all generated files)
        $(call print-help,dist,Build a distributable tarball)
        @echo  ''
+       @echo  'Linux-user targets:'
+       $(call print-help,update-linux-vdso,Build linux-user vdso images)
+       @echo  ''
        @echo  'Test targets:'
        $(call print-help,check,Run all tests (check-help for details))
        $(call print-help,bench,Run all benchmarks)
-- 
2.34.1