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There is currently no `dllimport` attribute on any of our function, which prevents MSVC to optimize function calls. To fix that issue, we need to redeclare all our visibility macros for each of our libraries, because when compiling e.g. GIO code, we need dllimport in GLIB headers and dllexport in GIO headers. That means they cannot use the same GLIB_AVAILABLE_* macro. Since that's a lot of boilerplate to copy/paste after each version bump, this MR generate all those macros using a python script. Also simplify the meson side by using `gnu_symbol_visibility : 'hidden'` keyword argument instead of passing the cflag manually. This leaves only API index to add manually into glib-docs.xml when bumping GLib version. That file cannot be generated because Meson does not allow passing a buit file to gnome.gtkdoc()'s main_xml kwarg unfortunately.
The files asnprintf.c printf-args.c printf-args.h printf-parse.c printf-parse.h vasnprintf.c vasnprintf.h are taken from the vasnprintf module of the GNUlib package, which can be found at: http://www.gnu.org/software/gnulib/ All files have been modified to include g-gnulib.h. vasnprintf.c has also been modified to include support for long long printing if the system printf doesn't. This code is protected by #ifndef HAVE_LONG_LONG_FORMAT. Code has been added to printf-args.[ch], printf-parse.c and vasnprintf.c to support printing of __int64 values with the I64 format modifier. This is protected by #ifdef HAVE_INT64_AND_I64. The files printf.h printf.c g-gnulib.h have been written by me. printf.[hc] contain implementations of the remaining functions in the printf family based on vasnprintf. g-gnulib.h is included by all source files in order to move all exported functions to the _g_gnulib namespace, replace malloc by g_malloc and make sure that snprintf is only used if it implements C99 return value semantics. Matthias Clasen November 1, 2003 To update: * Create an empty directory, put a configure.ac file into it. * Run gnulib-tool --lgpl=2 --import --lib=libgnu --source-base=lib \ --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=. \ --no-conditional-dependencies --no-libtool --macro-prefix=gl \ isnand-nolibm isnanf-nolibm isnanl-nolibm printf-frexpl \ signbit vasnprintf * Then pick out the files that are already in glib/gnulib subdirectory (the rest of the files are not needed): asnprintf.c c++defs.h float+.h fpucw.h gnulib_math.h.in (rename from math.in.h) isnan.c isnand.c isnand-nolibm.h isnanf.c isnanf-nolibm.h isnanl.c isnanl-nolibm.h printf-args.c printf-args.h printf-frexp.c printf-frexp.h printf-frexpl.c printf-frexpl.h printf-parse.c printf-parse.h signbitd.c signbitf.c signbitl.c vasnprintf.c vasnprintf.h verify.h xsize.h * Then look at the glib-gnulib.patch and re-introduce custom glib changes contained in that patch. * If gnulib_math.h.in got some new @variables@, these will have to be somehow set in meson.build, otherwise meson would warn about them at configure stage LRN June 06, 2018