bug#14414: 24.3.50; configure fails to detect xaw3d on Cygwin

[Katsumi Yamaoka]

Katsumi Yamaoka wrote:
>> When trying to build Emacs on Cygwin the configure script says:

>> [...]
>> checking sys/inotify.h presence... no
>> checking for sys/inotify.h... no
>> checking for xaw3d... no
>> checking for libXaw... configure: error: Lucid toolkit requires
>> X11/Xaw include files

> This should be due to Cygwin update or something, since it happens
> with the released version of Emacs 24.3, oops.  I'm closing this.
> Sorry for the noise.

I think the cause of this problem is that LIB_CLOCK_GETTIME in
some files[1] aren't substituted by configure, due to Gcc 4.5.3
that Cygwin updated recently.  Here is a part in question in
config.log:

configure:11868: gcc -std=gnu99 -o conftest.exe  -g3 -O2 -D_REENTRANT 
-I/usr/include/librsvg-2.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include 
-I/usr/include/gdk-pixbuf-2.0 -I/usr/include/cairo -I/usr/include/libpng15 
-I/usr/include/pixman-1 -I/usr/include/freetype2   -I/usr/include/p11-kit-1     
    conftest.c @LIB_CLOCK_GETTIME@ -lgnutls -lnettle -lhogweed -lgmp -lintl 
-liconv -ltasn1 -lp11-kit -lz   -lrsvg-2 -lgio-2.0 -lgdk_pixbuf-2.0 -lcairo 
-lgmodule-2.0 -lgobject-2.0 -lffi -lpixman-1 -lfontconfig -lexpat -lfreetype 
-lbz2 -lpng15 -lm -lz -lxcb-shm -lxcb-render -lXrender -lXext -lglib-2.0 -lintl 
-liconv -lpcre -lX11 -lxcb -lXau -lXdmcp   -lX11 -lpthread   >&5 
gcc: @LIB_CLOCK_GETTIME@: No such file or directory

[1]
autogen/Makefile.in:LIB_CLOCK_GETTIME = @LIB_CLOCK_GETTIME@
lib-src/Makefile.in:LIB_CLOCK_GETTIME = @LIB_CLOCK_GETTIME@
lib/Makefile.in:LIB_CLOCK_GETTIME = @LIB_CLOCK_GETTIME@
src/Makefile.in:LIB_CLOCK_GETTIME=@LIB_CLOCK_GETTIME@

However, manually replacing those @LIB_CLOCK_GETTIME@ with -lrt
(after running autogen.sh) didn't help.  I'm going to tackle it
again next week.