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meson.build: Test for ptrdiff_t in <stddef.h>
The build scripts assumed ptrdiff_t to just be around by default. But POSIX specifies ptrdiff_t to be defined in <stddef.h>, which is now included from the test. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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@ -97,6 +97,7 @@ check_headers = [['dlfcn.h','HAVE_DLFCN_H'],
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['inttypes.h', 'HAVE_INTTYPES_H'],
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['memory.h', 'HAVE_MEMORY_H'],
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['poll.h', 'HAVE_POLL_H'],
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['stddef.h', 'HAVE_STDDEF_H'],
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['stdint.h', 'HAVE_STDINT_H'],
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['stdio_ext.h', 'HAVE_STDIO_EXT_H'],
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['strings.h', 'HAVE_STRINGS_H'],
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@ -140,8 +141,8 @@ if cc.has_function('clock_gettime', prefix : '#include <time.h>')
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cdata.set('HAVE_CLOCK_GETTIME', 1)
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endif
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if cc.has_type('ptrdiff_t')
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cdata.set('HAVE_PTRDIFF_T')
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if cc.has_type('ptrdiff_t', prefix : '#include <stddef.h>')
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cdata.set('HAVE_PTRDIFF_T', 1)
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endif
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if cc.has_function('mkstemp', prefix : '#include <stdlib.h>')
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