On Sat, 18 Sep 2021, Timo Rothenpieler wrote:
On 18.09.2021 15:48, Gianfranco Costamagna wrote:
Hello Timo
Il giorno sab 18 set 2021 alle ore 13:15 Timo Rothenpieler <
t...@rothenpieler.org> ha scritto:
On 18.09.2021 11:06, Gianfranco Costamagna wrote:
New gcc changed the way it exposes armhf build flags.
"the architecture now has to include the cpu features, see the man page,
arM options"
example of build failure:
https://launchpad.net/ubuntu/+source/ffmpeg/7:4.4-6ubuntu1/+build/22070856
Note: this syntax was introduced in GCC 8
https://gcc.gnu.org/gcc-8/changes.html
---
configure | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/configure b/configure
index 7ac23123c7..571b70208c 100755
--- a/configure
+++ b/configure
@@ -5000,7 +5000,7 @@ elif enabled arm; then
elif check_arm_arch 6ZK; then echo armv6zk
elif check_arm_arch 6T2; then echo armv6t2
elif check_arm_arch 7; then echo armv7
- elif check_arm_arch 7A 7_A; then echo armv7-a
+ elif check_arm_arch 7A 7_A; then echo armv7-a+fp
elif check_arm_arch 7S; then echo armv7-a
elif check_arm_arch 7R 7_R; then echo armv7-r
elif check_arm_arch 7M 7_M; then echo armv7-m
Does this still work with older gccs, or will those be broken after this?
I checked gcc-10 and it works too.
The new naming has been introduced in gcc-8, so there should be no issues
even for backporting the package to old systems.
What is the oldest supported compiler for ffmpeg?
At least all the way back to gcc-4, and some other exotic non-gcc compilers.
Though I'm not sure what the minimum with armv7 support is, or when gcc
introduced it.
If it break some older compiler that's used on some stable branch of some
distro, that'd be an issue.
+1, if this new syntax was introduced with GCC 8, I guess this would break
building with GCC 7, and that's a rather new version to break IMO.
I'll try to reproduce this and look into it.
// Martin
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