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Fix compiler warnings in Travis.

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Travis forces _FORTIFY_SOURCE, which enables warn_unused_result annotations in glibc. Some of those annotations are of dubious value; in the case of asprintf(3) and vasprintf(3), they flag code that doesn't check the return value as unsafe even if it checks the pointer instead (which is guaranteed to be NULL in case of failure, and arguably more useful than the return value). Unfortunately, gcc intentionally ignores (void) casts, so we have no choice but to quench the warning with -Wno-unused-result. However, some of the compilers we wish to support don't recognize it, so we move it from the developer flags to the Travis environment.

While there, switch Travis from Precious to Trusty.
This commit is contained in:
Dag-Erling Smørgrav 2017-05-01 16:52:22 +02:00 committed by GitHub
parent 48269ce937
commit d4ae7a43cb
3 changed files with 6 additions and 2 deletions
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3
.travis.yml
View file

@ -1,3 +1,5 @@
dist: trusty
language: c language: c
compiler: compiler:
- clang - clang
@ -17,6 +19,7 @@ script:
# Coverity Scan configuration # Coverity Scan configuration
env: env:
global: global:
- CFLAGS="-Wno-unused-result"
- secure: "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" - secure: "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"
addons: addons:
coverity_scan: coverity_scan:

2
configure.ac
View file

@ -165,7 +165,7 @@ AM_CONDITIONAL([RSAREF_TESTS], [test x"enable_rsaref_tests" = x"yes"])
AC_ARG_ENABLE([developer-warnings], AC_ARG_ENABLE([developer-warnings],
AS_HELP_STRING([--enable-developer-warnings], AS_HELP_STRING([--enable-developer-warnings],
[enable strict warnings (default is NO)]), [enable strict warnings (default is NO)]),
[CFLAGS="${CFLAGS} -Wall -Wextra -Wcast-qual -Wshadow -Wno-unused-result"]) [CFLAGS="${CFLAGS} -Wall -Wextra -Wcast-qual -Wshadow"])
AC_ARG_ENABLE([debugging-symbols], AC_ARG_ENABLE([debugging-symbols],
AS_HELP_STRING([--enable-debugging-symbols], AS_HELP_STRING([--enable-debugging-symbols],
[enable debugging symbols (default is NO)]), [enable debugging symbols (default is NO)]),

3
lib/test/cryb_t_main.c
View file

@ -139,7 +139,8 @@ t_add_test(t_func *func, void *arg, const char *fmt, ...)
err(1, "malloc()"); err(1, "malloc()");
t->func = func; t->func = func;
va_start(ap, fmt); va_start(ap, fmt);
(void)vasprintf(&t->desc, fmt, ap); if (vasprintf(&t->desc, fmt, ap) < 0)
err(1, "vasprintf()");
va_end(ap); va_end(ap);
t->arg = arg; t->arg = arg;
t_grow(1); t_grow(1);