path: root/Makefile
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authorGravatar Thomas De Schampheleire <patrickdepinguin+buildroot@gmail.com>2012-02-08 17:22:17 +0100
committerGravatar Peter Korsgaard <jacmet@sunsite.dk>2012-02-09 22:06:05 +0100
commit0edfb24c3840dd8df7cd69b8bdc3d4244334d2a1 (patch)
tree3dd02ee9d72e0394f430062aa5b43e42362b2dc8 /Makefile
parenta792668b58fd5f551f30d40c2352f16011f1f92f (diff)
dependencies: check minimal make version early on
Although support/dependencies/dependencies.sh checks for the version of make, this script doesn't get a chance to run if make encounters a syntax error as a result of being too old. For example, the following syntax is only supported from make 3.81 onwards: ifeq ($(BR2_TOOLCHAIN_BUILDROOT),y) include toolchain/toolchain-buildroot.mk else ifeq ($(BR2_TOOLCHAIN_EXTERNAL),y) include toolchain/toolchain-external.mk else ifeq ($(BR2_TOOLCHAIN_CTNG),y) include toolchain/toolchain-crosstool-ng.mk endif This patch adds a check for the version of make very early in the Makefile, so that old make versions are handled gracefully. [Peter: simplify check] Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com> Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Diffstat (limited to 'Makefile')
1 files changed, 6 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 90d1a9d502..2b228f7c3a 100644
--- a/Makefile
+++ b/Makefile
@@ -26,6 +26,12 @@
# Set and export the version string
export BR2_VERSION:=2012.02-git
+# Check for minimal make version (note: this check will break at make 10.x)
+ifeq ($(firstword $(sort $(MAKE_VERSION) $(MIN_MAKE_VERSION))),$(MAKE_VERSION))
+$(error You have make '$(MAKE_VERSION)' installed. GNU make >= $(MIN_MAKE_VERSION) is required)
# This top-level Makefile can *not* be executed in parallel