[PATCH vkd3d 6/6] build: Drop hack for stripping RPC includes from widl-generated headers.

[Józef Kucia]

From: Józef Kucia <jkucia at codeweavers.com>

This requires widl from Wine >= 3.20:

  commit b7402ddbbecdfaa81daa657fbb5d37661f401434
  Author: Józef Kucia <jkucia at codeweavers.com>
  Date:   Mon Nov 19 15:07:02 2018 +0100

      widl: Guard RPC includes with #ifdef _WIN32.

Signed-off-by: Józef Kucia <jkucia at codeweavers.com>
---
 Makefile.am  |  6 ++----
 configure.ac |  2 +-
 m4/widl.m4   | 14 ++++++++++++++
 3 files changed, 17 insertions(+), 5 deletions(-)
 create mode 100644 m4/widl.m4

diff --git a/Makefile.am b/Makefile.am
index 9ad7b2e3b9a5..2b5bca0871c6 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -170,9 +170,7 @@ vkd3d_v_widl_1 =
 EXTRA_DIST += $(widl_headers) $(widl_headers:.h=.idl)
 $(widl_headers): %.h: %.idl
 if HAVE_WIDL
-	$(VKD3D_V_WIDL)$(WIDL) -h -o $@.tmp $<
-	$(AM_V_at)$(SED) -e '/#include <rpc.h>/d' -e '/#include <rpcndr.h>/d' <$@.tmp >$@
-	$(AM_V_at)$(RM) $@.tmp
+	$(VKD3D_V_WIDL)$(WIDL) -h -o $@ $<
 else
 	@echo "widl is required to generate $@"
 endif
@@ -235,7 +233,7 @@ $(CROSS32_IMPLIBS): %.cross32.a: %.cross32.def
 	$(AM_V_GEN)$(CROSS32_DLLTOOL) -k -m i386 --as-flags=-32 -d $< -l $@
 
 $(CROSS32_EXEFILES): %.cross32.exe: %.c $(CROSS32_IMPLIBS) $(widl_headers)
-	$(AM_V_CCLD)depbase=`echo $@ | sed 's![^/]*$$!$(DEPDIR)/&!;s!\.exe$$!!'`; \
+	$(AM_V_CCLD)depbase=`echo $@ | $(SED) 's![^/]*$$!$(DEPDIR)/&!;s!\.exe$$!!'`; \
 	$(CROSS32_CC) $(CROSS_CFLAGS) -MT $@ -MD -MP -MF $$depbase.Tpo -o $@ $< $(CROSS32_IMPLIBS) -ldxgi -lgdi32 && \
 	$(am__mv) $$depbase.Tpo $$depbase.Po
 else
diff --git a/configure.ac b/configure.ac
index 029278126b49..28f2ac908733 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,7 +26,7 @@ AC_PROG_CC
 AM_PROG_CC_C_O
 AC_PROG_SED
 AC_PROG_MKDIR_P
-AC_CHECK_PROG([WIDL], [widl], [widl], [no])
+VKD3D_PROG_WIDL(3, 20)
 AS_IF([test "x$WIDL" = "xno"], [AC_MSG_WARN([widl is required to build header files.])])
 
 AM_INIT_AUTOMAKE([1.11 foreign silent-rules subdir-objects no-dist-gzip dist-xz -Wall -Werror])
diff --git a/m4/widl.m4 b/m4/widl.m4
new file mode 100644
index 000000000000..2849356f7c04
--- /dev/null
+++ b/m4/widl.m4
@@ -0,0 +1,14 @@
+dnl VKD3D_PROG_WIDL(major, minor)
+AC_DEFUN([VKD3D_PROG_WIDL],
+
+[AC_CHECK_PROG([WIDL], [widl], [widl], [no])
+
+AS_IF([test "x$WIDL" != "xno"],
+[AC_MSG_CHECKING([checking whether widl version >= $1.$2])
+vkd3d_widl_version=`$WIDL -V | $SED -E '/version/{s/.* version (.*)/\1/;q;}'`
+
+AX_COMPARE_VERSION([$vkd3d_widl_version], [ge], [$1.$2],
+                   [AC_MSG_RESULT([yes ($vkd3d_widl_version)])],
+                   [AC_MSG_RESULT([no ($vkd3d_widl_version)])
+                   WIDL=no])
+])])
-- 
2.21.0