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configure: warn if GCC 4.2 is being used

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The wiki, Ticket1464, and Ticket3970 warn about the usage of GCC 4.2.
This fixes Ticket3970.

Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
This commit is contained in:
Ganesh Ajjanagadde 2015-08-26 09:36:25 -04:00 committed by Carl Eugen Hoyos
parent 0382c546cc
commit bfe525e632
1 changed files with 8 additions and 1 deletions
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9
configure vendored
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@ -3542,6 +3542,7 @@ tms470_flags(){
probe_cc(){
pfx=$1
_cc=$2
first=$3
unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
unset _ld_o _ldflags _ld_lib _ld_path
@ -3567,6 +3568,12 @@ probe_cc(){
case $gcc_basever in
2*) _depflags='-MMD -MF $(@:.o=.d) -MT $@' ;;
esac
if [ "$first" = true ]; then
case $gcc_basever in
4.2*)
warn "gcc 4.2 is outdated and may miscompile FFmpeg. Please use a newer compiler." ;;
esac
fi
_cflags_speed='-O3'
_cflags_size='-Os'
elif $_cc --version 2>/dev/null | grep -q ^icc; then
@ -3729,7 +3736,7 @@ set_ccvars(){
fi
}
probe_cc cc "$cc"
probe_cc cc "$cc" "true"
cflags_filter=$_flags_filter
cflags_speed=$_cflags_speed
cflags_size=$_cflags_size