I've been debugging the plplot-5.10.0 build under MSYS and finally found, it can all go well only when the "include/freetype2" cflags are manually included in the build.make files (containing the gcc commands) for plfreetype.c and for wingcc.c. This build uses freetype 15.0.9, where include/ft2build.h points to <freetype/config/ftheader.h>. Despite its presence in pkgconfig/freetype2.pc cflags line, the actual compile command (in build.make) includes "-DUNSINGDLL -I" with nothing attached to the -I.
The funny thing, though, is that treatment of the include/freetype2 flag is correct for pango, cairo, etc., all those more complicated packages come in with freetype2 as well where necessary. I bellieve plfreetype and wingcc are the only modules that access freetype directly, without using libraries also dependent on freetype.. I've tried adding include/freetype2 directory to C_includes.rsp files and to flags.make files, that has no effect the CMAKECACHE shows the following: FREETYPE_INCLUDEDIR:INTERNAL=D:/Mingw/msys/1.0/local/include FREETYPE_INCLUDE_DIRS:INTERNAL=D:/Mingw/msys/1.0/local/include/freetype2;D:/Mingw/msys/1.0/local/include FREETYPE_CFLAGS:INTERNAL=-ID:/Mingw/msys/1.0/local/include/freetype2;-ID:/Mingw/msys/1.0/local/include de _CAIRO_STATIC_CFLAGS:INTERNAL=-mms-bitfields;-ID:/Mingw/msys/1.0/local/include/freetype2;-ID:/Mingw/ msys/1.0/local/include;-ID:/Mingw/include/cairo;-ID:/Mingw/include/glib-2.0;-ID:/Mingw/lib/glib-2.0/ include;-ID:/Mingw/include/pixman-1;-ID:/Mingw/include;-ID:/Mingw/include/libpng15 _CAIRO_INCLUDE_DIRS:INTERNAL=D:/Mingw/msys/1.0/local/include/freetype2;D:/Mingw/msys/1.0/local/inclu de;D:/Mingw/include/cairo;D:/Mingw/include/glib-2.0;D:/Mingw/lib/glib-2.0/include;D:/Mingw/include/p ixman-1;D:/Mingw/include;D:/Mingw/include/libpng15 I have no clue about where to search to resolve this, as I am still on the bunny slopes of the CMAKE learning curve.
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