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Avoid warning in output code on 64-bit native Windows platforms.

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This commit is contained in:
Bruno Haible
2016-11-26 02:54:25 +01:00
parent baf89d87f0
commit b468e3aae0
2 changed files with 23 additions and 1 deletions
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15
src/output.cc
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@@ -1169,7 +1169,20 @@ output_keyword_entry (KeywordExt *temp, int stringpool_index, const char *indent
if (option[TYPE])
printf ("{");
if (option[SHAREDLIB])
printf ("(int)(long)&((struct %s_t *)0)->%s_str%d",
/* How to determine a certain offset in stringpool at compile time?
- The standard way would be to use the 'offsetof' macro. But it is only
defined in <stddef.h>, and <stddef.h> is not among the prerequisite
header files that the user must #include.
- The next best way would be to take the address and cast to 'intptr_t'
or 'uintptr_t'. But these types are only defined in <stdint.h>, and
<stdint.h> is not among the prerequisite header files that the user
must #include.
- The next best approximation of 'uintptr_t' is 'size_t'. It is defined
in the prerequisite header <string.h>.
- The types 'long' and 'unsigned long' do work as well, but on 64-bit
native Windows platforms, they don't have the same size as pointers
and therefore generate warnings. */
printf ("(int)(size_t)&((struct %s_t *)0)->%s_str%d",
option.get_stringpool_name (), option.get_stringpool_name (),
stringpool_index);
else