Stepan Kasal wrote:
Hi,
On Fri, Feb 04, 2005 at 03:58:51PM +0200, Philippe Trottier wrote:
CPPFLAGS=-I${prefix}/include
LDFLAGS=-L${exec_prefix}/lib
Is there better way to expand ${prefix} other than using sed ?
here is something I have noticed, exec_prefix is set to NONE until the
end of the config script... now I am thinking to see if it is set at
NONE and if it is then set exec_prefix to ${prefix}, and put it back to
NONE afterward ... does that make any sense ?
yes, use the shell builtin `eval'. The following macro can serve as an
example:
http://www.gnu.org/software/ac-archive/ac_define_dir.html
So you can do this in your configure.ac:
m4_define([DIR_EXISTS],
[prefix_NONE= exec_prefix_NONE=
test "x$prefix" = xNONE && prefix_NONE=yes && prefix=$ac_default_prefix
test "x$exec_prefix" = xNONE && exec_prefix_NONE=yes && exec_prefix=$prefix
eval ac_define_dir="\"$1\""
test "$prefix_NONE" && prefix=NONE
test "$exec_prefix_NONE" && exec_prefix=NONE
test -d "$ac_define_dir" dnl
])dnl
And call it as
DIR_EXISTS($includedir) && CPPFLAGS="-I$includedir $CPPFLAGS"
or
AC_MSG_CHECKING([for headers directory])
if DIR_EXISTS($includedir); then
CPPFLAGS="-I$includedir $CPPFLAGS"
AC_MSG_RESULT($includedir)
else
AC_MSG_RESULT(none)
fi
I noticed several slight problems in your code:
enableval="yes"
...
if test "$enableval" = "yes" ; then
You should use enable_search_prefix in both cases.
`enableval' is available only in the code given as arguments to
AC_ARG_ENABLE, and even if you set it, enable_search_prefix will
remain unset.
Ok good, for later trouble finding ---
AC_MSG_CHECKING([prefix for libraries and headers])
...
AC_MSG_RESULT([yes])
I believe you are too verbose here. Determining the value of one variable,
moreless directly set by the user, doesn't qualify as a `check' in my eyes.
I am more or less trying to find the evil in this, so I got really
verbose...
Thank you very much for the help here !
Philippe
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