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configure: fix compiler warnings in system function checks

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Avoid using (void *)1 as an output buffer to fix detection of supported
system functions due to -Werror and -Wstringop-overflow etc.
This commit is contained in:
Miroslav Lichvar
2025-08-14 13:55:54 +02:00
parent 51d161a028
commit 6c5973741b
1 changed files with 13 additions and 8 deletions
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21
configure vendored
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@@ -666,13 +666,15 @@ then
fi
if [ $try_clock_gettime = "1" ]; then
if test_code 'clock_gettime()' 'time.h' '' '' \
'clock_gettime(CLOCK_REALTIME, (void *)1);'
if test_code 'clock_gettime()' 'time.h' '' '' '
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);'
then
add_def HAVE_CLOCK_GETTIME
else
if test_code 'clock_gettime() in -lrt' 'time.h' '' '-lrt' \
'clock_gettime(CLOCK_REALTIME, (void *)1);'
if test_code 'clock_gettime() in -lrt' 'time.h' '' '-lrt' '
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);'
then
add_def HAVE_CLOCK_GETTIME
EXTRA_LIBS="$EXTRA_LIBS -lrt"
@@ -699,13 +701,16 @@ else
fi
if [ $try_arc4random = "1" ] && \
test_code 'arc4random_buf()' 'stdlib.h' '' '' \
'arc4random_buf((void *)1, 1);'
test_code 'arc4random_buf()' 'stdlib.h' '' '' '
char c;
arc4random_buf(&c, 1);'
then
add_def HAVE_ARC4RANDOM
else
if test_code 'getrandom()' 'stdlib.h sys/random.h' '' '' \
'return getrandom((void *)1, 1, 0);'; then
if test_code 'getrandom()' 'stdlib.h sys/random.h' '' '' '
char c;
return getrandom(&c, 1, 0);'
then
add_def HAVE_GETRANDOM
fi
fi