| Message ID | orzftudm9l.fsf@lxoliva.fsfla.org |
|---|---|
| State | New |
| Headers | show |
| Series | [testsuite] introduce strndup effective target | expand |
On Tue, Apr 16, 2024 at 5:23 AM Alexandre Oliva <oliva@adacore.com> wrote: > > > A number of tests that call strndup fail on vxworks, where there's no > strndup. Some of them already had workarounds to skip the strndup > parts of the tests on platforms that don't offer it. I've changed > them to rely on a strndup effective target instead, and extended the > logic to other tests that were otherwise skipped entirely. > > Regstrapped on x86_64-linux-gnu. Also tested with gcc-13 on arm-, > aarch64-, x86- and x86_64-vxworks7r2. Ok to install? OK > > for gcc/ChangeLog > > * doc/sourcebuild.texi (strndup): Add effective target. > > for gcc/testsuite/ChangeLog > > * lib/target-supports.exp (check_effective_target_strndup): New. > * gcc.dg/builtin-dynamic-object-size-0.c: Skip strndup tests > when the function is not available. > * gcc.dg/builtin-dynamic-object-size-1.c: Likewise. > * gcc.dg/builtin-dynamic-object-size-2.c: Likewise. > * gcc.dg/builtin-dynamic-object-size-3.c: Likewise. > * gcc.dg/builtin-dynamic-object-size-4.c: Likewise. > * gcc.dg/builtin-object-size-1.c: Likewise. > * gcc.dg/builtin-object-size-2.c: Likewise. > * gcc.dg/builtin-object-size-3.c: Likewise. > * gcc.dg/builtin-object-size-4.c: Likewise. > --- > gcc/doc/sourcebuild.texi | 3 +++ > .../gcc.dg/builtin-dynamic-object-size-0.c | 10 +++++++++- > gcc/testsuite/gcc.dg/builtin-object-size-1.c | 7 ++++--- > gcc/testsuite/gcc.dg/builtin-object-size-2.c | 7 ++++--- > gcc/testsuite/gcc.dg/builtin-object-size-3.c | 7 ++++--- > gcc/testsuite/gcc.dg/builtin-object-size-4.c | 7 ++++--- > gcc/testsuite/lib/target-supports.exp | 11 +++++++++++ > 7 files changed, 39 insertions(+), 13 deletions(-) > > diff --git a/gcc/doc/sourcebuild.texi b/gcc/doc/sourcebuild.texi > index 7c0df90e82236..8e4e59ac44c74 100644 > --- a/gcc/doc/sourcebuild.texi > +++ b/gcc/doc/sourcebuild.texi > @@ -2837,6 +2837,9 @@ can be included without error when @option{-mbig-endian} is passed. > @item stpcpy > Target provides @code{stpcpy} function. > > +@item strndup > +Target provides @code{strndup} function. > + > @item sysconf > Target supports @code{sysconf}. > > diff --git a/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-0.c b/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-0.c > index 173e7c755f4c9..d02e37f79d95f 100644 > --- a/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-0.c > +++ b/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-0.c > @@ -1,7 +1,7 @@ > /* { dg-do run } */ > /* { dg-options "-O2" } */ > /* { dg-require-effective-target size20plus } */ > -/* { dg-skip-if "no strndup" { hppa*-*-hpux* } } */ > +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ > > #include "builtin-object-size-common.h" > > @@ -567,6 +567,7 @@ test_strdup (const char *in) > return sz; > } > > +#ifndef SKIP_STRNDUP > size_t > __attribute__ ((noinline)) > test_strndup (const char *in, size_t bound) > @@ -577,6 +578,7 @@ test_strndup (const char *in, size_t bound) > __builtin_free (res); > return sz; > } > +#endif > > size_t > __attribute__ ((noinline)) > @@ -589,6 +591,7 @@ test_strdup_min (const char *in) > return sz; > } > > +#ifndef SKIP_STRNDUP > size_t > __attribute__ ((noinline)) > test_strndup_min (const char *in, size_t bound) > @@ -599,6 +602,7 @@ test_strndup_min (const char *in, size_t bound) > __builtin_free (res); > return sz; > } > +#endif > > /* Other tests. */ > > @@ -788,12 +792,16 @@ main (int argc, char **argv) > const char *str = "hello world"; > if (test_strdup (str) != __builtin_strlen (str) + 1) > FAIL (); > +#ifndef SKIP_STRNDUP > if (test_strndup (str, 4) != 5) > FAIL (); > +#endif > if (test_strdup_min (str) != __builtin_strlen (str) + 1) > FAIL (); > +#ifndef SKIP_STRNDUP > if (test_strndup_min (str, 4) != 1) > FAIL (); > +#endif > > DONE (); > } > diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-1.c b/gcc/testsuite/gcc.dg/builtin-object-size-1.c > index 4f7d4c0b370f5..d6d13c5ef7a29 100644 > --- a/gcc/testsuite/gcc.dg/builtin-object-size-1.c > +++ b/gcc/testsuite/gcc.dg/builtin-object-size-1.c > @@ -1,6 +1,7 @@ > /* { dg-do run } */ > /* { dg-options "-O2 -Wno-stringop-overread" } */ > /* { dg-require-effective-target alloca } */ > +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ > > #include "builtin-object-size-common.h" > > @@ -621,7 +622,7 @@ test10 (void) > } > } > > -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ > +#ifndef SKIP_STRNDUP > /* Tests for strdup/strndup. */ > size_t > __attribute__ ((noinline)) > @@ -709,7 +710,7 @@ test11 (void) > FAIL (); > free (res); > } > -#endif /* avr */ > +#endif > > int > main (void) > @@ -726,7 +727,7 @@ main (void) > test8 (); > test9 (1); > test10 (); > -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ > +#ifndef SKIP_STRNDUP > test11 (); > #endif > DONE (); > diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-2.c b/gcc/testsuite/gcc.dg/builtin-object-size-2.c > index 37d3dcc6f5689..c28d72eee9bfe 100644 > --- a/gcc/testsuite/gcc.dg/builtin-object-size-2.c > +++ b/gcc/testsuite/gcc.dg/builtin-object-size-2.c > @@ -1,6 +1,7 @@ > /* { dg-do run } */ > /* { dg-options "-O2 -Wno-stringop-overread" } */ > /* { dg-require-effective-target alloca } */ > +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ > > #include "builtin-object-size-common.h" > > @@ -536,7 +537,7 @@ test8 (unsigned cond) > #endif > } > > -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ > +#ifndef SKIP_STRNDUP > /* Tests for strdup/strndup. */ > size_t > __attribute__ ((noinline)) > @@ -624,7 +625,7 @@ test9 (void) > FAIL (); > free (res); > } > -#endif /* avr */ > +#endif > > int > main (void) > @@ -639,7 +640,7 @@ main (void) > test6 (); > test7 (); > test8 (1); > -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ > +#ifndef SKIP_STRNDUP > test9 (); > #endif > DONE (); > diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-3.c b/gcc/testsuite/gcc.dg/builtin-object-size-3.c > index f4d1ebf7027bf..3f58da3d500cd 100644 > --- a/gcc/testsuite/gcc.dg/builtin-object-size-3.c > +++ b/gcc/testsuite/gcc.dg/builtin-object-size-3.c > @@ -1,6 +1,7 @@ > /* { dg-do run } */ > /* { dg-options "-O2 -Wno-stringop-overread" } */ > /* { dg-require-effective-target alloca } */ > +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ > > #include "builtin-object-size-common.h" > > @@ -628,7 +629,7 @@ test10 (void) > } > } > > -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ > +#ifndef SKIP_STRNDUP > /* Tests for strdup/strndup. */ > size_t > __attribute__ ((noinline)) > @@ -717,7 +718,7 @@ test11 (void) > FAIL (); > free (res); > } > -#endif /* avr */ > +#endif > > int > main (void) > @@ -734,7 +735,7 @@ main (void) > test8 (); > test9 (1); > test10 (); > -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ > +#ifndef SKIP_STRNDUP > test11 (); > #endif > DONE (); > diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-4.c b/gcc/testsuite/gcc.dg/builtin-object-size-4.c > index 2887dd150423b..b3eb36efb744d 100644 > --- a/gcc/testsuite/gcc.dg/builtin-object-size-4.c > +++ b/gcc/testsuite/gcc.dg/builtin-object-size-4.c > @@ -1,6 +1,7 @@ > /* { dg-do run } */ > /* { dg-options "-O2 -Wno-stringop-overread" } */ > /* { dg-require-effective-target alloca } */ > +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ > > #include "builtin-object-size-common.h" > > @@ -509,7 +510,7 @@ test8 (unsigned cond) > #endif > } > > -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ > +#ifndef SKIP_STRNDUP > /* Tests for strdup/strndup. */ > size_t > __attribute__ ((noinline)) > @@ -597,7 +598,7 @@ test9 (void) > FAIL (); > free (res); > } > -#endif /* avr */ > +#endif > > int > main (void) > @@ -612,7 +613,7 @@ main (void) > test6 (); > test7 (); > test8 (1); > -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ > +#ifndef SKIP_STRNDUP > test9 (); > #endif > DONE (); > diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp > index edce672c0e21a..17c8382adf143 100644 > --- a/gcc/testsuite/lib/target-supports.exp > +++ b/gcc/testsuite/lib/target-supports.exp > @@ -11580,6 +11580,17 @@ proc check_effective_target_stpcpy {} { > return [check_function_available "stpcpy"] > } > > +# Returns 1 if "strndup" is available on the target system. > + > +proc check_effective_target_strndup {} { > + if { [istarget *-*-vxworks*] } { > + # VxWorks doesn't have strndup but our way to test fails > + # to detect as we're doing partial links for kernel modules. > + return 0 > + } > + return [check_function_available "strndup"] > +} > + > # Returns 1 if "sigsetjmp" is available on the target system. > # Also check if "__sigsetjmp" is defined since that's what glibc > # uses. > > -- > Alexandre Oliva, happy hacker https://FSFLA.org/blogs/lxo/ > Free Software Activist GNU Toolchain Engineer > More tolerance and less prejudice are key for inclusion and diversity > Excluding neuro-others for not behaving ""normal"" is *not* inclusive
On Apr 16, 2024, Alexandre Oliva <oliva@adacore.com> wrote: > * gcc.dg/builtin-dynamic-object-size-1.c: Likewise. > * gcc.dg/builtin-dynamic-object-size-2.c: Likewise. > * gcc.dg/builtin-dynamic-object-size-3.c: Likewise. > * gcc.dg/builtin-dynamic-object-size-4.c: Likewise. These hunks were missing from the patch I posted, sorry. I goofed when resolving the conflicts because the tests had been modified after gcc-13. I hope the intent was clear from the ChangeLog entry. Here they are. diff --git a/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-1.c b/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-1.c index ffa59985024f5..76b4f704fed9c 100644 --- a/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-1.c +++ b/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-1.c @@ -1,7 +1,7 @@ /* { dg-do run } */ /* { dg-options "-O2 -Wno-stringop-overread" } */ /* { dg-require-effective-target alloca } */ -/* { dg-skip-if "no strndup" { hppa*-*-hpux* } } */ +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ #define __builtin_object_size __builtin_dynamic_object_size #include "builtin-object-size-1.c" diff --git a/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-2.c b/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-2.c index fff32da7aea14..cb757a8d699cf 100644 --- a/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-2.c +++ b/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-2.c @@ -1,7 +1,7 @@ /* { dg-do run } */ /* { dg-options "-O2 -Wno-stringop-overread" } */ /* { dg-require-effective-target alloca } */ -/* { dg-skip-if "no strndup" { hppa*-*-hpux* } } */ +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ #define __builtin_object_size __builtin_dynamic_object_size #include "builtin-object-size-2.c" diff --git a/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-3.c b/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-3.c index ac223d67b10a4..8a12f023f27bc 100644 --- a/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-3.c +++ b/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-3.c @@ -1,7 +1,7 @@ /* { dg-do run } */ /* { dg-options "-O2 -Wno-stringop-overread" } */ /* { dg-require-effective-target alloca } */ -/* { dg-skip-if "no strndup" { hppa*-*-hpux* } } */ +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ #define __builtin_object_size __builtin_dynamic_object_size #include "builtin-object-size-3.c" diff --git a/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-4.c b/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-4.c index fdf4284ae1158..0efc2d9858422 100644 --- a/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-4.c +++ b/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-4.c @@ -1,7 +1,7 @@ /* { dg-do run } */ /* { dg-options "-O2 -Wno-stringop-overread" } */ /* { dg-require-effective-target alloca } */ -/* { dg-skip-if "no strndup" { hppa*-*-hpux* } } */ +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ #define __builtin_object_size __builtin_dynamic_object_size #include "builtin-object-size-4.c"
On Apr 18, 2024, at 4:32 AM, Alexandre Oliva <oliva@adacore.com> wrote: > > On Apr 16, 2024, Alexandre Oliva <oliva@adacore.com> wrote: > >> * gcc.dg/builtin-dynamic-object-size-1.c: Likewise. >> * gcc.dg/builtin-dynamic-object-size-2.c: Likewise. >> * gcc.dg/builtin-dynamic-object-size-3.c: Likewise. >> * gcc.dg/builtin-dynamic-object-size-4.c: Likewise. > > These hunks were missing from the patch I posted No worries, thanks for all the hard work.
diff --git a/gcc/doc/sourcebuild.texi b/gcc/doc/sourcebuild.texi index 7c0df90e82236..8e4e59ac44c74 100644 --- a/gcc/doc/sourcebuild.texi +++ b/gcc/doc/sourcebuild.texi @@ -2837,6 +2837,9 @@ can be included without error when @option{-mbig-endian} is passed. @item stpcpy Target provides @code{stpcpy} function. +@item strndup +Target provides @code{strndup} function. + @item sysconf Target supports @code{sysconf}. diff --git a/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-0.c b/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-0.c index 173e7c755f4c9..d02e37f79d95f 100644 --- a/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-0.c +++ b/gcc/testsuite/gcc.dg/builtin-dynamic-object-size-0.c @@ -1,7 +1,7 @@ /* { dg-do run } */ /* { dg-options "-O2" } */ /* { dg-require-effective-target size20plus } */ -/* { dg-skip-if "no strndup" { hppa*-*-hpux* } } */ +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ #include "builtin-object-size-common.h" @@ -567,6 +567,7 @@ test_strdup (const char *in) return sz; } +#ifndef SKIP_STRNDUP size_t __attribute__ ((noinline)) test_strndup (const char *in, size_t bound) @@ -577,6 +578,7 @@ test_strndup (const char *in, size_t bound) __builtin_free (res); return sz; } +#endif size_t __attribute__ ((noinline)) @@ -589,6 +591,7 @@ test_strdup_min (const char *in) return sz; } +#ifndef SKIP_STRNDUP size_t __attribute__ ((noinline)) test_strndup_min (const char *in, size_t bound) @@ -599,6 +602,7 @@ test_strndup_min (const char *in, size_t bound) __builtin_free (res); return sz; } +#endif /* Other tests. */ @@ -788,12 +792,16 @@ main (int argc, char **argv) const char *str = "hello world"; if (test_strdup (str) != __builtin_strlen (str) + 1) FAIL (); +#ifndef SKIP_STRNDUP if (test_strndup (str, 4) != 5) FAIL (); +#endif if (test_strdup_min (str) != __builtin_strlen (str) + 1) FAIL (); +#ifndef SKIP_STRNDUP if (test_strndup_min (str, 4) != 1) FAIL (); +#endif DONE (); } diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-1.c b/gcc/testsuite/gcc.dg/builtin-object-size-1.c index 4f7d4c0b370f5..d6d13c5ef7a29 100644 --- a/gcc/testsuite/gcc.dg/builtin-object-size-1.c +++ b/gcc/testsuite/gcc.dg/builtin-object-size-1.c @@ -1,6 +1,7 @@ /* { dg-do run } */ /* { dg-options "-O2 -Wno-stringop-overread" } */ /* { dg-require-effective-target alloca } */ +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ #include "builtin-object-size-common.h" @@ -621,7 +622,7 @@ test10 (void) } } -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ +#ifndef SKIP_STRNDUP /* Tests for strdup/strndup. */ size_t __attribute__ ((noinline)) @@ -709,7 +710,7 @@ test11 (void) FAIL (); free (res); } -#endif /* avr */ +#endif int main (void) @@ -726,7 +727,7 @@ main (void) test8 (); test9 (1); test10 (); -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ +#ifndef SKIP_STRNDUP test11 (); #endif DONE (); diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-2.c b/gcc/testsuite/gcc.dg/builtin-object-size-2.c index 37d3dcc6f5689..c28d72eee9bfe 100644 --- a/gcc/testsuite/gcc.dg/builtin-object-size-2.c +++ b/gcc/testsuite/gcc.dg/builtin-object-size-2.c @@ -1,6 +1,7 @@ /* { dg-do run } */ /* { dg-options "-O2 -Wno-stringop-overread" } */ /* { dg-require-effective-target alloca } */ +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ #include "builtin-object-size-common.h" @@ -536,7 +537,7 @@ test8 (unsigned cond) #endif } -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ +#ifndef SKIP_STRNDUP /* Tests for strdup/strndup. */ size_t __attribute__ ((noinline)) @@ -624,7 +625,7 @@ test9 (void) FAIL (); free (res); } -#endif /* avr */ +#endif int main (void) @@ -639,7 +640,7 @@ main (void) test6 (); test7 (); test8 (1); -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ +#ifndef SKIP_STRNDUP test9 (); #endif DONE (); diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-3.c b/gcc/testsuite/gcc.dg/builtin-object-size-3.c index f4d1ebf7027bf..3f58da3d500cd 100644 --- a/gcc/testsuite/gcc.dg/builtin-object-size-3.c +++ b/gcc/testsuite/gcc.dg/builtin-object-size-3.c @@ -1,6 +1,7 @@ /* { dg-do run } */ /* { dg-options "-O2 -Wno-stringop-overread" } */ /* { dg-require-effective-target alloca } */ +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ #include "builtin-object-size-common.h" @@ -628,7 +629,7 @@ test10 (void) } } -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ +#ifndef SKIP_STRNDUP /* Tests for strdup/strndup. */ size_t __attribute__ ((noinline)) @@ -717,7 +718,7 @@ test11 (void) FAIL (); free (res); } -#endif /* avr */ +#endif int main (void) @@ -734,7 +735,7 @@ main (void) test8 (); test9 (1); test10 (); -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ +#ifndef SKIP_STRNDUP test11 (); #endif DONE (); diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-4.c b/gcc/testsuite/gcc.dg/builtin-object-size-4.c index 2887dd150423b..b3eb36efb744d 100644 --- a/gcc/testsuite/gcc.dg/builtin-object-size-4.c +++ b/gcc/testsuite/gcc.dg/builtin-object-size-4.c @@ -1,6 +1,7 @@ /* { dg-do run } */ /* { dg-options "-O2 -Wno-stringop-overread" } */ /* { dg-require-effective-target alloca } */ +/* { dg-additional-options "-DSKIP_STRNDUP" { target { ! strndup } } } */ #include "builtin-object-size-common.h" @@ -509,7 +510,7 @@ test8 (unsigned cond) #endif } -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ +#ifndef SKIP_STRNDUP /* Tests for strdup/strndup. */ size_t __attribute__ ((noinline)) @@ -597,7 +598,7 @@ test9 (void) FAIL (); free (res); } -#endif /* avr */ +#endif int main (void) @@ -612,7 +613,7 @@ main (void) test6 (); test7 (); test8 (1); -#if !defined(__AVR__) && !defined(__hpux__) /* avr and hpux have no strndup */ +#ifndef SKIP_STRNDUP test9 (); #endif DONE (); diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp index edce672c0e21a..17c8382adf143 100644 --- a/gcc/testsuite/lib/target-supports.exp +++ b/gcc/testsuite/lib/target-supports.exp @@ -11580,6 +11580,17 @@ proc check_effective_target_stpcpy {} { return [check_function_available "stpcpy"] } +# Returns 1 if "strndup" is available on the target system. + +proc check_effective_target_strndup {} { + if { [istarget *-*-vxworks*] } { + # VxWorks doesn't have strndup but our way to test fails + # to detect as we're doing partial links for kernel modules. + return 0 + } + return [check_function_available "strndup"] +} + # Returns 1 if "sigsetjmp" is available on the target system. # Also check if "__sigsetjmp" is defined since that's what glibc # uses.