On 06/14/2012 07:37 PM, Timothy Madden wrote:
On 06/14/2012 07:07 PM, Roger Pau Monné wrote:
On Thu, Jun 14, 2012 at 5:01 PM, Timothy
Madden<terminatorul@xxxxxxxxx> wrote:
Hello
I see in the info pages that autoconf macros check for various
programs and
set a variable if found, but how do I get the behaviour I see in most
configure programs to exit with an error if a program is not found ?
I usually use the following macro:
AC_DEFUN([AX_PATH_PROG_OR_FAIL],
[AC_PATH_PROG([$1], [$2], [no])
if test x"${$1}" == x"no"
then
AC_MSG_ERROR([Unable to find $2, please install $2])
fi])
So on my configure.ac I make the following calls:
AX_PATH_PROG_OR_FAIL([PERL], [perl])
Where "PERL" is the name of the variable where to store the path, and
"perl" is the name of the program to search for.
How about the predefined programs ?
AC_PROG_YACC might set YACC to 'bison -y', how would I check that 'bison
-y' is found or is on path ?
I find that the following command
command -v bison -y
works as expected and returns 0 if bison is found or non-zero if there
is no bison.
What do you know about the portability of `command` ? Can I use it in my
configure.ac ?
Or is there a better way to exit after AC_PROG_YACC if bison is not
found ? Or to exit if AC_PROG_CXX does not find a C++ compiler ?
And really, is there no support in autoconf itself for this ?
Is there no flag or option to make the resulting configure exit
automatically if any of the checks fail ?
Thank you,
Timothy Madden
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