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build: new configure option --enable-gcc-warnings

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This has a similar meaning as in other GNU applications
such as coreutils and Emacs.
* NEWS: Document it.
* .gitignore: Remove redundant build-aux.
Remove gnu, since gnu/Makefile.am is now in git.
Add gnu/.gitignore, gnu/charset.alias, gnu/*.h, gnu/*/ to cover
autogenerated files.
* bootstrap.conf (gnulib_mk): Remove.
* configure.ac: Add support for --enable-gcc-warnings,
taken from coreutils and simplified.
* gnu/Makefile.am: New file.  Formerly this was autogenerated,
but the autogenerated file has been renamed to gnulib.mk,
its usual name when bootstrapping from gnulib.
This way, AM_CFLAGS can incorporate warning options.
* gnulib.modules: Add manywarnings.
* lib/Makefile.am, src/Makefile.am (AM_CFLAGS): New macro,
incorporating warning options.
* lib/attr-xattr.in.h (ENOATTR): New macro, if not already defined.
* src/buffer.c (magic): Don't rely on incomplete initializers.
* src/common.h (report_difference): Add printf format attribute.
* src/system.c (sys_exec_command, sys_exec_info_script)
(sys_exec_checkpoint_script):
* src/tar.c (update_argv):
Add casts to char * to pacify GCC warnings about using string
literals in a char * context.
* src/xattrs.c, src/xattrs.h (xattrs_clear_setup):
Declare parameters as (void), not ().
* src/xheader.c (xheader_format_name): Initialize pptr to null,
to pacify GCC.  Remove unnecessary test of nptr versus null.
This commit is contained in:
Paul Eggert
2012-12-18 20:36:22 -08:00
parent 8c0146d2c9
commit cbc51277aa
16 changed files with 124 additions and 37 deletions
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12
src/system.c
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@@ -722,8 +722,8 @@ sys_exec_command (char *file_name, int typechar, struct tar_stat_info *st)
stat_to_env (file_name, typechar, st);
argv[0] = "/bin/sh";
argv[1] = "-c";
argv[0] = (char *) "/bin/sh";
argv[1] = (char *) "-c";
argv[2] = to_command_option;
argv[3] = NULL;
@@ -837,8 +837,8 @@ sys_exec_info_script (const char **archive_name, int volume_number)
xclose (p[PREAD]);
argv[0] = "/bin/sh";
argv[1] = "-c";
argv[0] = (char *) "/bin/sh";
argv[1] = (char *) "-c";
argv[2] = (char *) info_script_option;
argv[3] = NULL;
@@ -885,8 +885,8 @@ sys_exec_checkpoint_script (const char *script_name,
setenv ("TAR_FORMAT",
archive_format_string (current_format == DEFAULT_FORMAT ?
archive_format : current_format), 1);
argv[0] = "/bin/sh";
argv[1] = "-c";
argv[0] = (char *) "/bin/sh";
argv[1] = (char *) "-c";
argv[2] = (char *) script_name;
argv[3] = NULL;