On 07/24/2009 11:25 AM, Jan Engelhardt wrote:
Hi,
when one has a program that does something like
if(strcmp(argv[0], "gunzip") == 0)
uncompress();
else
compress();
and this program also uses a libtool library, then the - lets use this
example - just-built "gzip" file will be around 4 kilobytes only, it is
a libtool wrapper scripts for .libs/gzip. "gunzip" would then be a
symlink to "gzip", but calling gunzip results in the libtool script
calling gzip instead, thereby leading to the wrong mode of operation.
This makes it hard to run libtooled programs from within the compilation
directory. A possible workaround is that the libtool wrapper script
honors $0 a little more:
Since anyway you have to use install-programs-hook to create the
multipurpose binary, you can add another name (e.g. gztool) and invoke
it like "gztool gzip" or "gztool gunzip" while uninstalled:
#ifdef _WIN32
executable_name = strrchr (argv[0], '\\');
if (!executable_name || strchr (executable_name, '/'))
executable_name = strrchr (argv[0], '/');
#else
executable_name = strrchr (argv[0], '/');
#endif /* _WIN32 */
if (executable_name)
executable_name++;
else
executable_name = argv[0];
if (!strcasecmp (executable_name, "gztool" EXEEXT)
|| (EXEEXT[0] && !strcasecmp (executable_name, "gztool")
|| !strcasecmp (executable_name, "lt-gztool" EXEEXT)
|| (EXEEXT[0] && !strcasecmp (executable_name, "lt-gztool")))
{
program_name = strdup (argv[1]);
argv++, argc--;
}
else
{
int n = strlen (executable_name);
program_name = strdup (executable_name);
/* Strip the executable extension if needed. */
if (EXEEXT[0]
&& n > strlen (EXEEXT)
&& !strcasecmp (program_name + n - strlen (EXEEXT), EXEEXT))
program_name[n - strlen (EXEEXT)] = 0;
}
if (strcmp (program_name, "gzip"))
exit (compress ());
else
exit (uncompress ());
Make gztool noinst_PROGRAMS and you're done.
Paolo
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