8f0dd9478e
Future releases of GCC are planning to remove[0] default support for some old features that were removed from C99 but GCC still accepts. We can test for these changes by using the following -Werror= directives -Werror=implicit-int -Werror=implicit-function-declaration -Werror=int-conversion -Werror=strict-prototypes -Werror=old-style-definition Doing so revealed an issue with the auto/ tests in that the test programs always define main as int main() rather than int main(void) which results in a bunch of errors like build/autotest.c:3:23: error: function declaration isn't a prototype [-Werror=strict-prototypes] 3 | int main() { | ^~~~ build/autotest.c: In function 'main': build/autotest.c:3:23: error: old-style function definition [-Werror=old-style-definition] The fix was easy, it only required fixing the main prototype with find -type f -exec sed -i 's/int main() {/int main(void) {/g' {} \; Regardless of these upcoming GCC changes, this is probably a good thing to do anyway for correctness. [0]: https://fedoraproject.org/wiki/Changes/PortingToModernC Link: <https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/message/CJXKTLXJUPZ4F2C2VQOTNMEA5JAUPMBD/> Link: <https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/message/6SGHPHPAXKCVJ6PUZ57WVDQ5TDBVIRMF/> Reviewed-by: Alejandro Colomar <alx@nginx.com> Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
118 lines
2.7 KiB
Text
118 lines
2.7 KiB
Text
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# Copyright (C) Igor Sysoev
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# Copyright (C) NGINX, Inc.
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# Sizes of C types.
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# "-Wall -Werror" or similar constraints in default CFLAGS may require
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# to use "%zu" format to printf() result of sizeof(). But "%zu" may
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# be unavailable, so the "(int)" cast is a simple and portable solution:
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# printf("%d", (int) sizeof(TYPE));
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nxt_feature="int size"
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nxt_feature_name=NXT_INT_SIZE
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nxt_feature_run=value
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nxt_feature_incs=
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nxt_feature_libs=
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nxt_feature_test="#include <stdio.h>
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int main(void) {
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printf(\"%d\", (int) sizeof(int));
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return 0;
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}"
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. auto/feature
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nxt_feature="long size"
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nxt_feature_name=NXT_LONG_SIZE
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nxt_feature_run=value
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nxt_feature_incs=
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nxt_feature_libs=
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nxt_feature_test="#include <stdio.h>
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int main(void) {
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printf(\"%d\", (int) sizeof(long));
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return 0;
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}"
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. auto/feature
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nxt_feature="long long size"
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nxt_feature_name=NXT_LONG_LONG_SIZE
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nxt_feature_run=value
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nxt_feature_incs=
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nxt_feature_libs=
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nxt_feature_test="#include <stdio.h>
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int main(void) {
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printf(\"%d\", (int) sizeof(long long));
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return 0;
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}"
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. auto/feature
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nxt_feature="void * size"
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nxt_feature_name=NXT_PTR_SIZE
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nxt_feature_run=value
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nxt_feature_incs=
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nxt_feature_libs=
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nxt_feature_test="#include <stdio.h>
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int main(void) {
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printf(\"%d\", (int) sizeof(void *));
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return 0;
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}"
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. auto/feature
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case "$nxt_feature_value" in
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8) NXT_64BIT=1 ;;
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*) NXT_64BIT=0 ;;
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esac
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nxt_feature="size_t size"
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nxt_feature_name=NXT_SIZE_T_SIZE
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nxt_feature_run=value
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nxt_feature_incs=
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nxt_feature_libs=
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nxt_feature_test="#include <stdio.h>
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int main(void) {
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printf(\"%d\", (int) sizeof(size_t));
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return 0;
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}"
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. auto/feature
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nxt_feature="off_t size"
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nxt_feature_name=NXT_OFF_T_SIZE
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nxt_feature_run=value
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nxt_feature_incs=
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nxt_feature_libs=
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nxt_feature_test="#define _FILE_OFFSET_BITS 64
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#include <unistd.h>
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#include <stdio.h>
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int main(void) {
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printf(\"%d\", (int) sizeof(off_t));
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return 0;
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}"
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. auto/feature
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nxt_feature="time_t size"
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nxt_feature_name=NXT_TIME_T_SIZE
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nxt_feature_run=value
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nxt_feature_incs=
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nxt_feature_libs=
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nxt_feature_test="#include <time.h>
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#include <stdio.h>
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int main(void) {
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printf(\"%d\", (int) sizeof(time_t));
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return 0;
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}"
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. auto/feature
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