26 lines
1.4 KiB
Diff
26 lines
1.4 KiB
Diff
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--- a/gnu/vasnprintf.c
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+++ b/gnu/vasnprintf.c
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@@ -4858,7 +4858,11 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *
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#endif
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*fbp = dp->conversion;
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#if USE_SNPRINTF
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-# if !(((__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined __UCLIBC__) || ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
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+# if ! (((__GLIBC__ > 2 \
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+ || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) \
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+ && !defined __UCLIBC__) \
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+ || (defined __APPLE__ && defined __MACH__) \
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+ || ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
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fbp[1] = '%';
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fbp[2] = 'n';
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fbp[3] = '\0';
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@@ -4872,6 +4876,9 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *
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in format strings in writable memory may crash the program
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(if compiled with _FORTIFY_SOURCE=2), so we should avoid it
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in this situation. */
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+ /* macOS 10.13 High Sierra behaves like glibc with
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+ _FORTIFY_SOURCE=2, and older macOS releases
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+ presumably do not need %n. */
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/* On native Windows systems (such as mingw), we can avoid using
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%n because:
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- Although the gl_SNPRINTF_TRUNCATION_C99 test fails,
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