Hello all,
having a medium size project that i want to built with GNU autotools,
i discovered that using or not using a config.h file seems to be not
interchangeable (at least if one is doing macro expansion the way i
did - this might be understanding the expansion wrong at all ...):
I would like to have a default file location hard coded in my binary
but of course depending on the installation path. The file will be
installed in $(datadir), so i was looking for something like
<snip sourcefile foo.c>
#ifndef MY_CONFIG_FILE
#define MY_CONFIG_FILE "my_config_file"
#endif /* !MY_CONFIG_FILE */
const char *defaultConfFile = MY_CONFIG_FILE
...
printf("MY_CONFIG_FILE: %s\n", defaultConfFile);
...
<snip>
and
<snip configure.in>
MY_CONFIG_FILE="@datadir@/my_config_file"
AC_DEFINE_UNQUOTED([MY_CONFIG_FILE], "$MY_CONFIG_FILE",
[default configuration file])
<snip>
which leads to
bsailer@host $ ./configure --prefix=$HOME
...
bsailer@host $ ./foo
MY_CONFIG_FILE: /home/bsailer/share/my_config_file
bsailer@host $
now i'd like to use config.h (as there will be many defines in my project),
but as soon as introducing
<snip configure.in>
AC_CONFIG_HEADERS(config.h)
</snip>
and
<snip config.h.in>
/* default configuration file */
#undef MY_CONFIG_FILE
</snip>
after configuration and build the output changes:
bsailer@host $ ./configure --prefix=$HOME
...
bsailer@host $ ./foo
MY_CONFIG_FILE: @datadir@/my_config_file
bsailer@host $
what an i doing wrong? I'm using
automake-1.7.6-1
autoconf-2.57-3
Thanks in advance for all advices ...
Benjamin
--
*****************************************************************
Benjamin Sailer
eMail: Benjamin.Sailer@xxxxxxxxx
*****************************************************************
Disclaimer: This signature has been generated automatically and
does not reflect my opinion at all.
-- Benjamin Sailer
I'd like to meet the guy who invented beer and see what he's working on now.
