Making progress!
Here's what I've got now:
############## OpenEXR
AC_MSG_CHECKING(for openexr support)
AC_LANG(C++)
AC_CHECK_HEADER(OpenEXR/half.h,,AC_MSG_ERROR([*** openexr dev header half.h
not found ***]))
AC_LANG(C)
# AM_PATH_OPENEXR(have_openexr=yes OPENEXR='openexr', have_openexr=no
OPENEXR= )
OPENEXR_INCLUDES="-I/usr/include/OpenEXR"
AC_SUBST(OPENEXR_INCLUDES)
# end OpenEXR
This works, barely. I tried using $prefix and $ac_default_prefix in
OPENEXR_INCLUDES, but those gave NONE and /usr/local/include respectively.
How do I get the hard path to /usr out of OPENEXR_INCLUDES?
For OPENEXR_LIBS I have that set in Makefile.am. OpenEXR is a plug-in,
should not link to the main program.
I didn't change AC_MSG_CHECKING as Stepan suggested because I'm not clear
what I should do instead or why.
There's an old AM_PATH_OPENEXR macro somebody had created in our
acinclude.m4, but it reports no OpenEXR unless used with flags on the line
with ./configure. This was from before OpenEXR was packaged, when we had to
use optional args to add OpenEXR. Suggestions?
AC_DEFUN(AM_PATH_OPENEXR,
[dnl
dnl Get the cflags and libraries
dnl
AC_ARG_WITH(openexr-prefix,[ --with-openexr-prefix=PFX Prefix where
libopenexr is installed (optional)], openexr_prefix="$withval",
openexr_prefix="")
AC_ARG_ENABLE(openexrtest, [ --disable-openexrtest Do not try to
compile and run a test Openexr program],, enable_openexrtest=yes)
if test "x$openexr_prefix" != "xNONE" ; then
openexr_args="$openexr_args --prefix=$openexr_prefix"
OPENEXR_INCLUDES="-I$openexr_prefix/include/OpenEXR"
OPENEXR_LIBS="-L$openexr_prefix/lib"
elif test "$prefix" != ""; then
openexr_args="$openexr_args --prefix=$prefix"
OPENEXR_INCLUDES="-I$prefix/include/OpenEXR"
OPENEXR_LIBS="-L$prefix/lib"
fi
OPENEXR_LIBS="$X_LIBS $OPENEXR_LIBS -lIlmImf -lImath -lIex -lHalf -lz"
AC_MSG_CHECKING(for OpenEXR)
no_openexr=""
if test "x$enable_openexrtest" = "xyes" ; then
ac_save_CXXFLAGS="$CXXFLAGS"
ac_save_LIBS="$LIBS"
CXXFLAGS="$CXXFLAGS $OPENEXR_CXXFLAGS $OPENEXR_INCLUDES $OPENEXR_LIBS"
LIBS="$LIBS $OPENEXR_LIBS"
rm -f conf.openexrtest
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_RUN([
#include <stdlib.h>
#include <ImfRgbaFile.h>
#include <stdio.h>
int main ()
{ printf("running openexrtest program... ");
try
{
Imf::RgbaInputFile exr ("");
}
catch (...)
{
}
system("touch conf.openexrtest");
return 0;
}
],, no_openexr=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
AC_LANG_RESTORE
CXXFLAGS="$ac_save_CXXFLAGS"
LIBS="$ac_save_LIBS"
fi
if test "x$no_openexr" = "x" ; then
AC_MSG_RESULT(yes)
ifelse([$1], , :, [$1])
else
AC_MSG_RESULT(no)
if test -f conf.openexrtest ; then
:
else
echo "*** Could not run OpenEXR test program, checking why..."
CXXFLAGS="$CXXFLAGS $OPENEXR_CXXFLAGS $OPENEXR_INCLUDES
$OPENEXR_LIBS"
LIBS="$LIBS $OPENEXR_LIBS"
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_LINK([
#include <stdio.h>
#include <ImfRgbaFile.h>
], [ Imf::RgbaInputFile exr ("");return 0; ],
[ echo "*** The test program compiled, but did not run. This usually
means"
echo "*** that the run-time linker is not finding OpenEXR or finding
the wrong"
echo "*** version of OpenEXR. If it is not finding OpenEXR, you'll
need to set your"
echo "*** LD_LIBRARY_PATH environment variable, or edit
/etc/ld.so.conf to point"
echo "*** to the installed location Also, make sure you have run
ldconfig if that"
echo "*** is required on your system"
echo "*** LD_LIBRARY_PATH = "
printenv LD_LIBRARY_PATH
echo "*** OPENEXR_LIBS = $OPENEXR_LIBS"
echo "*** OPENEXR_INCLUDES = $OPENEXR_INCLUDES"
echo "***"])
AC_LANG_RESTORE
CXXFLAGS="$ac_save_CXXFLAGS"
LIBS="$ac_save_LIBS"
fi
OPENEXR_INCLUDES=""
OPENEXR_LIBS=""
ifelse([$2], , :, [$2])
fi
AC_SUBST(OPENEXR_INCLUDES)
AC_SUBST(OPENEXR_LIBS)
rm -f conf.openexrtest
])
Thanks,
Robin
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