Hello,
Several solaris users have problems when compiling LyX with a recent
G++, due to the fact that X headers in /usr/openwin/include do not
have proper return types. After seeing a lot of complaints, I finally
decided to try to work around it in configure:)
I searched around the list archives, and the best advice I found is
the following from Alexandre Oliva
Meanwhile, people who want to compile C++/X11 applications on Solaris
will have to arrange that the -I/usr/openwin/include autoconf detects
for X11 is removed if /usr/include/X11 exists, and is edited with
`s/-I/-isystem /' otherwise.
[message http://sourceware.cygnus.com/ml/autoconf/1999-08/msg00057.html]
If I understand correctly a naive (and untested) implementation of
this would be to add after AC_PATH_XTRA something like:
if test -d /usr/include/X11 ; then
X_CFLAGS=`echo ${X_CFLAGS} | sed -e 's,-I/usr/openwin/include,,'`
else
X_CFLAGS=`echo ${X_CFLAGS} | sed -e 's,-I\(/usr/openwin/include\),-isystem \1,'`
fi
However, before, implementing that, I wonder whether this has already
been done (right) for some other C++ programs, using autoconf 2.13.
I'd feel safer borrowing some tried code (I found nothing in the
archive) than writing things I can't test myself.
A particular question that I have is whether this -isystem flag is a
GNU extension, and in which gcc versions it can be found.
Any help welcome.
JMarc
