libs/fst: Update from upstream

Makefile

@@ -1057,6 +1057,7 @@ vcxsrc: $(GENFILES) $(EXTRA_TARGETS)
 	rm -rf yosys-win32-vcxsrc-$(YOSYS_VER){,.zip}
 	set -e; for f in `ls $(filter %.cc %.cpp,$(GENFILES)) $(addsuffix .cc,$(basename $(OBJS))) $(addsuffix .cpp,$(basename $(OBJS))) 2> /dev/null`; do \
 		echo "Analyse: $$f" >&2; cpp -std=c++17 -MM -I. -D_YOSYS_ $$f; done | sed 's,.*:,,; s,//*,/,g; s,/[^/]*/\.\./,/,g; y, \\,\n\n,;' | grep '^[^/]' | sort -u | grep -v kernel/version_ > srcfiles.txt
+	echo "libs/fst/fst_win_unistd.h" >> srcfiles.txt
 	bash misc/create_vcxsrc.sh yosys-win32-vcxsrc $(YOSYS_VER) $(GIT_REV)
 	echo "namespace Yosys { extern const char *yosys_version_str; const char *yosys_version_str=\"Yosys (Version Information Unavailable)\"; }" > kernel/version.cc
 	zip yosys-win32-vcxsrc-$(YOSYS_VER)/genfiles.zip $(GENFILES) kernel/version.cc

libs/fst/00_PATCH_win_io.patch

@@ -0,0 +1,11 @@
+--- fst_win_unistd.h
++++ fst_win_unistd.h
+@@ -26,7 +26,7 @@
+ #define WIN_UNISTD_H
+
+ #include <stdlib.h>
+-#ifdef _WIN64
++#if defined(_MSC_VER)
+ #include <io.h>
+ #else
+ #include <sys/io.h>

libs/fst/00_PATCH_win_zlib.patch

@@ -0,0 +1,16 @@
+--- fstapi.h
++++ fstapi.h
+@@ -33,11 +33,12 @@ extern "C" {
+ #include <stdlib.h>
+ #include <string.h>
+ #include <ctype.h>
+-#include <zlib.h>
+ #include <inttypes.h>
+ #if defined(_MSC_VER)
++    #include "libs/zlib/zlib.h"
+     #include "fst_win_unistd.h"
+ #else
++    #include <zlib.h>
+     #include <unistd.h>
+ #endif
+ #include <time.h>

libs/fst/00_UPDATE.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+mv config.h config.h.bak
+rm -f *.txt *.cc *.h
+git clone --depth 1 https://github.com/gtkwave/gtkwave fst_upstream
+rm fst_upstream/lib/libfst/CMakeLists.txt
+mv fst_upstream/lib/libfst/*.{h,c,txt} .
+rm -rf fst_upstream
+
+for src in *.c; do
+    mv -- "$src" "${src%.c}.cc"
+done
+mv config.h.bak config.h
+
+sed -i -e 's,<config.h>,"config.h",' *.cc *.h
+sed -i -e 's,"fastlz.c","fastlz.cc",' *.cc *.h
+
+patch -p0 < 00_PATCH_win_zlib.patch
+patch -p0 < 00_PATCH_win_io.patch