[Bug general/29093] New: clang fails to compile 0.187: error.c:50:17:

[Bug general/29093] New: clang fails to compile 0.187: error.c:50:17:

[yuri at tsoft dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29093

            Bug ID: 29093
           Summary: clang fails to compile 0.187: error.c:50:17:
           Product: elfutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: general
          Assignee: unassigned at sourceware dot org
          Reporter: yuri at tsoft dot com
                CC: elfutils-devel at sourceware dot org
  Target Milestone: ---

> cc -D_GNU_SOURCE -DHAVE_CONFIG_H -DLOCALEDIR='"/usr/local/share/locale"' -I. -I..  -I. -I. -I../lib -I.. -I./../libelf -fno-omit-frame-pointer -I/usr/local/include -std=gnu99 -Wall -Wshadow -Wformat=2 -Wold-style-definition -Wstrict-prototypes    -Wnull-dereference -Wimplicit-fallthrough -Werror -Wunused -Wextra    -fPIC -D_FORTIFY_SOURCE=3 -O2 -pipe -fno-omit-frame-pointer  -I/usr/local/share/gnulib/lib -Wno-null-dereference -Wno-unused-value -DFREEBSD_HAS_MEMPCPY -fstack-protector-strong -fno-strict-aliasing  -MT obstack_printf.o -MD -MP -MF .deps/obstack_printf.Tpo -c -o obstack_printf.o obstack_printf.c
> error.c:50:17: error: format string is not a string literal [-Werror,-Wformat-nonliteral]
>                         verr(status, format, ap);
>                                      ^~~~~~
> error.c:52:18: error: format string is not a string literal [-Werror,-Wformat-nonliteral]
>                         verrx(status, format, ap);
>                                       ^~~~~~
> error.c:55:10: error: format string is not a string literal [-Werror,-Wformat-nonliteral]
>                         vwarn(format, ap);
>                               ^~~~~~
> error.c:57:11: error: format string is not a string literal [-Werror,-Wformat-nonliteral]
>                         vwarnx(format, ap);
>                                ^~~~~~
> 4 errors generated.

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[Bug general/29093] clang fails to compile 0.187: error: format string is not a string literal

[yuri at tsoft dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29093

yuri at tsoft dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|clang fails to compile      |clang fails to compile
                   |0.187: error.c:50:17:       |0.187: error: format string
                   |                            |is not a string literal

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[Bug general/29093] clang fails to compile 0.187: error: format string is not a string literal

[mark at klomp dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=29093

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mark at klomp dot org

--- Comment #1 from Mark Wielaard <mark at klomp dot org> ---
This is in fallback code in case the platform doesn't have error.h, but does
have err.h.

This seems to be a difference/bug between gcc and clang -Wformat-nonliteral.

Clang implements this mostly the same way as GCC, but there is a difference for
functions that accept a va_list argument (for example, vprintf). GCC does not
emit -Wformat-nonliteral warning for calls to such functions.

You might be able to fix this by annotating the error function itself.

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