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On 11/24/21 10:10 PM Greg Ercolano
wrote:
On 11/24/21 11:25 AM, Mark Olesen wrote:
Mark J Olesen@DESKTOP-64I0KOO MINGW64 ~/opensource/fltk
$ make
[..]
=== making src ="">
make[1]: Entering directory '/home/Mark J
Olesen/opensource/fltk/src'
Compiling Fl.cxx...
In file included from Fl.cxx:22:
../FL/platform.H:51:14: fatal error: X11/Xlib.h: No such file or
directory
51 | # include <X11/Xlib.h>
| ^~~~~~~~~~~~
compilation terminated.
Having trouble replicating here, using a fresh install of
msys2 + fltk cloned from git
on Windows 8. (I see you used Win10, but I wouldn't think
it'd matter).
Sails right through the build of fltk-1.4.x freshly cloned
from github.
(I think you haven't mentioned which version of FLTK you're
using, so I'm
to assume the current master from git)
Perhaps the devil's in the details of how you installed
msys2?
Yes I think that's the case. The "problem" with MSYS2 is that there
are several "personalities" of the build tools, one for MSYS itself
(you MUST NOT use that one) and one for Windows (MinGW) 32-bit and
64-bit. You can use one of the latter, I'm using the 64-bit
versions.
In my case:
1) I followed steps 1 through 7 on this page: https://www.msys2.org/
2) Not sure why, but 'git' was not part of the
'base-devel' install in step 7 above,
so I had to install it with: pacman -S git
3) Cloned fltk, cd'ed into the directory and ran
'make':
git clone https://github.com/fltk/fltk.git
fltk-1.4.x.git
cd fltk-1.4.x.git
make
This automatically ran autogen, ran configured, and
then started building FLTK.
I think step 7 is the key:
$ pacman -S --needed base-devel mingw-w64-x86_64-toolchain
@Mark: you wrote:
> Are we missing some Windows flag to the compiler? It does not appear to
> be defining a Windows macro. So, platform.H thinks it is unix.
Exactly. Your gcc output does not contain the required _WIN32 macro
because this gcc "personality" is obviously for building MSYS
programs. For comparison, this is from my MSYS2 installation:
$ pacman -Qs | grep gcc # lists the installed gcc compiler
local/gcc-libs 10.2.0-1 (msys2-devel)
local/mingw-w64-x86_64-gcc 10.3.0-5 (mingw-w64-x86_64-toolchain)
local/mingw-w64-x86_64-gcc-ada 10.3.0-5 (mingw-w64-x86_64-toolchain)
local/mingw-w64-x86_64-gcc-fortran 10.3.0-5
(mingw-w64-x86_64-toolchain)
local/mingw-w64-x86_64-gcc-libgfortran 10.3.0-5
(mingw-w64-x86_64-toolchain)
local/mingw-w64-x86_64-gcc-libs 10.3.0-5
(mingw-w64-x86_64-toolchain)
local/mingw-w64-x86_64-gcc-objc 10.3.0-5
(mingw-w64-x86_64-toolchain)
local/mingw-w64-x86_64-libgccjit 10.3.0-5
(mingw-w64-x86_64-toolchain)
GNU Compiler Collection (libgccjit) for MinGW-w64
$ which g++
/mingw64/bin/g++
$ g++ -dM -E -x c++ - < /dev/null | grep WIN32
#define __WIN32__ 1
#define _WIN32 1
#define WIN32 1
#define __WIN32 1
This shows that the required _WIN32 macro is defined here.
Mark, please try to follow the instructions Greg showed above and I
believe you should get the correct toolchain installed and your
Msys2/MinGW installation should be able to build FLTK for a standard
Windows environment.
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