[Buildroot] [git commit branch/next] toolchain-external: support gcc < 4.3
Thomas Petazzoni
thomas.petazzoni at free-electrons.com
Fri Nov 25 21:59:10 UTC 2016
commit: https://git.buildroot.net/buildroot/commit/?id=006ba68a3020477e8358eb0253acaf15220b84b5
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/next
We currently support gcc as old as 4.3. However, Buildroot works
perfectly well with even older gcc versions (tested with 4.1). So we
can add an option BR2_TOOLCHAIN_EXTERNAL_GCC_OLD to support that. The
help text of this option is written with plenty of discouragement.
We use _OLD and not something like _PRE_4_3, because at some point we
will likely remove the 4.3 option and what would then require a name
change.
We don't set any _AT_LEAST option in this case because it's no use -
there is no lower bound on the version in this case. We therefore leave
BR2_TOOLCHAIN_GCC_AT_LEAST empty (the implicit default). When it is
empty, we don't do a version check at all in check_gcc_version
(previously we errored out when it was empty).
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout at mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
---
toolchain/helpers.mk | 3 +--
.../toolchain-external-custom/Config.in.options | 11 +++++++++++
2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/toolchain/helpers.mk b/toolchain/helpers.mk
index 3991bc1..72e7292 100644
--- a/toolchain/helpers.mk
+++ b/toolchain/helpers.mk
@@ -145,8 +145,7 @@ check_kernel_headers_version = \
check_gcc_version = \
expected_version="$(strip $2)" ; \
if [ -z "$${expected_version}" ]; then \
- printf "Internal error, gcc version unknown (no GCC_AT_LEAST_X_Y selected)\n"; \
- exit 1 ; \
+ exit 0 ; \
fi; \
real_version=`$(1) --version | sed -r -e '1!d; s/^[^)]+\) ([^[:space:]]+).*/\1/;'` ; \
if [[ ! "$${real_version}" =~ ^$${expected_version}\. ]] ; then \
diff --git a/toolchain/toolchain-external/toolchain-external-custom/Config.in.options b/toolchain/toolchain-external/toolchain-external-custom/Config.in.options
index cdc2555..5ff2491 100644
--- a/toolchain/toolchain-external/toolchain-external-custom/Config.in.options
+++ b/toolchain/toolchain-external/toolchain-external-custom/Config.in.options
@@ -59,6 +59,17 @@ config BR2_TOOLCHAIN_EXTERNAL_GCC_4_3
bool "4.3.x"
select BR2_TOOLCHAIN_GCC_AT_LEAST_4_3
+config BR2_TOOLCHAIN_EXTERNAL_GCC_OLD
+ bool "older"
+ help
+ Use this option if your GCC version is older than any of the
+ above.
+
+ Note that the Buildroot community doesn't do any testing with
+ such old toolchains. Some packages may fail to build in
+ surprising ways, or the generated root filesystem may not
+ work at all. Use such old toolchains at your own risk.
+
endchoice
choice
More information about the buildroot
mailing list