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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-03-09 15:36:53 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-08-30 08:40:47 -0300 |
| commit | 6c4ee1aba17f1e71b9ec856479260de9d362fdb6 (patch) | |
| tree | b26c5e53ebc892d5b63012a8a3e851406d499b1d /stdlib | |
| parent | e57d8fc97b90127de4ed3e3a9cdf663667580935 (diff) | |
| download | glibc-6c4ee1aba17f1e71b9ec856479260de9d362fdb6.tar.gz glibc-6c4ee1aba17f1e71b9ec856479260de9d362fdb6.tar.xz glibc-6c4ee1aba17f1e71b9ec856479260de9d362fdb6.zip | |
stdlib: Fix macro expansion producing 'defined' has undefined behavior
The FPIOCONST_HAVE_EXTENDED_RANGE is defined as:
#define FPIOCONST_HAVE_EXTENDED_RANGE \
((!defined __NO_LONG_DOUBLE_MATH && __LDBL_MAX_EXP__ > 1024) \
|| __HAVE_DISTINCT_FLOAT128)
Which is undefined behavior accordingly to C Standard (Preprocessing
directives, p4).
Checked on x86_64-linux-gnu.
Diffstat (limited to 'stdlib')
| -rw-r--r-- | stdlib/fpioconst.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/stdlib/fpioconst.h b/stdlib/fpioconst.h index 1e01999941..3e185f5751 100644 --- a/stdlib/fpioconst.h +++ b/stdlib/fpioconst.h @@ -52,9 +52,12 @@ - LDBL_MIN_EXP + 2)). When _Float128 is enabled in libm and it is ABI-distinct from long double (e.g. on powerpc64le), we also need powers of 10 up to floor (log_2 (FLT128_MANT_DIG - FLT128_MIN_EXP + 2)). */ -#define FPIOCONST_HAVE_EXTENDED_RANGE \ - ((!defined __NO_LONG_DOUBLE_MATH && __LDBL_MAX_EXP__ > 1024) \ - || __HAVE_DISTINCT_FLOAT128) +#if (!defined __NO_LONG_DOUBLE_MATH && __LDBL_MAX_EXP__ > 1024) \ + || __HAVE_DISTINCT_FLOAT128 +# define FPIOCONST_HAVE_EXTENDED_RANGE 1 +#else +# define FPIOCONST_HAVE_EXTENDED_RANGE 0 +#endif #if FPIOCONST_HAVE_EXTENDED_RANGE # define FPIOCONST_POW10_ARRAY_SIZE 15 |