From 065190a973c9534b93e3ff99b789bcc945032dfd Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 5 Jun 2024 17:11:10 +0900
Subject: [PATCH] [Bug #20524] win32: Try to configure GMP if available

---
 win32/Makefile.sub  | 12 ++++++------
 win32/configure.bat | 11 +++++++++++
 win32/setup.mak     | 15 +++++++++++++--
 3 files changed, 30 insertions(+), 8 deletions(-)

diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index b125bf5555..55a489aaf4 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -297,9 +297,7 @@ CXXFLAGS = $(CFLAGS)
 !if !defined(LDFLAGS)
 LDFLAGS = -incremental:no -debug -opt:ref -opt:icf
 !endif
-!if !defined(XLDFLAGS)
-XLDFLAGS = -stack:$(STACK)
-!endif
+XLDFLAGS = -stack:$(STACK) $(XLDFLAGS)
 !if !defined(RFLAGS)
 RFLAGS = -r
 !endif
@@ -1147,7 +1145,8 @@ miniruby: miniruby$(EXEEXT)
 miniruby$(EXEEXT):
 		@echo $(LIBS)
 		$(ECHO) linking $(@:\=/)
-		$(Q) $(PURIFY) $(CC) $(MAINOBJ) $(MINIOBJS) $(COMMONOBJS) $(LIBS) -Fe$@ -link $(LDFLAGS)
+		$(Q) $(PURIFY) $(CC) $(MAINOBJ) $(MINIOBJS) $(COMMONOBJS) $(LIBS) \
+			$(OUTFLAG)$@ -link $(LDFLAGS) $(XLDFLAGS)
 		@$(RM) miniruby.lib miniruby.exp
 		$(Q) miniruby.exe -v
 		$(Q) $(LDSHARED_1)
@@ -1217,7 +1216,8 @@ $(LIBRUBY_SO):	$(LIBRUBY_A) $(DLDOBJS) $(RUBYDEF) $(RUBY_SO_NAME).res
 !endif
 		$(ECHO) linking shared-library $(@:\=/)
 		$(Q) $(LDSHARED) $(DLDOBJS) $(LIBRUBY_A) \
-			$(RUBY_SO_NAME).res $(SOLIBS) $(EXTSOLIBS) $(LIBS) -Fe$@ -link $(LDFLAGS) \
+			$(RUBY_SO_NAME).res $(SOLIBS) $(EXTSOLIBS) $(LIBS) \
+			$(OUTFLAG)$@ -link $(LDFLAGS) $(XLDFLAGS) \
 			$(LIBRUBY_DLDFLAGS)
 		@$(RM) dummy.lib dummy.exp
 !if defined(LDSHARED_0)
@@ -1430,7 +1430,7 @@ rubyspec-capiext: $(RUBYSPEC_CAPIEXT_EXTS)
 	$(Q)$(MAKEDIRS) $(@D)
 	$(Q)echo> $*.def EXPORTS
 	$(Q)echo>> $*.def Init_$(*F)
-	$(Q)$(LDSHARED) -Fe$(@) $(INCFLAGS) $(CFLAGS) $(CPPFLAGS) $< $(LIBRUBYARG) -link $(DLDFLAGS) $(LIBS) $(LOCAL_LIBS) -implib:$*.lib -pdb:$*.pdb -def:$*.def
+	$(Q)$(LDSHARED) -Fe$(@) $(INCFLAGS) $(CFLAGS) $(CPPFLAGS) $< $(LIBRUBYARG) -link $(DLDFLAGS) $(XLDFLAGS) $(LIBS) $(LOCAL_LIBS) -implib:$*.lib -pdb:$*.pdb -def:$*.def
 !if defined(LDSHARED_0)
 	$(Q)$(LDSHARED_0)
 	$(Q)$(LDSHARED_1)
diff --git a/win32/configure.bat b/win32/configure.bat
index 7253ade28b..dd1a917adc 100755
--- a/win32/configure.bat
+++ b/win32/configure.bat
@@ -7,6 +7,9 @@ for %%I in (%0) do if /%%~dpI/ == /%CD%\/ (
     exit /b 999
 )
 
+set XINCFLAGS=
+set XLDFLAGS=
+
 echo> ~tmp~.mak ####
 echo>> ~tmp~.mak conf = %0
 echo>> ~tmp~.mak $(conf): nul
@@ -48,7 +51,9 @@ if "%1" == "--with-git" goto :git
 if "%1" == "--without-git" goto :nogit
 if "%1" == "--without-ext" goto :witharg
 if "%1" == "--without-extensions" goto :witharg
+if "%1" == "--with-opt-dir" goto :opt-dir
 if "%1" == "--with-gmp" goto :gmp
+if "%1" == "--with-gmp-dir" goto :gmp-dir
 if "%opt:~0,10%" == "--without-" goto :withoutarg
 if "%opt:~0,7%" == "--with-" goto :witharg
 if "%1" == "-h" goto :help
@@ -217,6 +222,10 @@ goto :loop ;
   shift
   shift
 goto :loop ;
+:gmp-dir
+:opt-dir
+  set XINCFLAGS=%XINCFLAGS% -I%2/include
+  set XLDFLAGS=%XLDFLAGS% -libpath:%2/lib
 :witharg
   echo>>confargs.tmp  %1=%2\
   set witharg=1
@@ -263,6 +272,8 @@ cl -EP confargs.c > ~setup~.mak 2>nul
 if exist pathlist.tmp echo>>~setup~.mak PATH = $(pathlist:;=/bin;)$(PATH)
 if exist pathlist.tmp echo>>~setup~.mak INCLUDE = $(pathlist:;=/include;)
 if exist pathlist.tmp echo>>~setup~.mak LIB = $(pathlist:;=/lib;)
+echo>>~setup~.mak XINCFLAGS = %XINCFLAGS%
+echo>>~setup~.mak XLDFLAGS = %XLDFLAGS%
 type>>~setup~.mak ~tmp~.mak
 del *.tmp > nul
 del ~tmp~.mak > nul
diff --git a/win32/setup.mak b/win32/setup.mak
index 8c27994821..632e6cad53 100644
--- a/win32/setup.mak
+++ b/win32/setup.mak
@@ -62,6 +62,12 @@ ENABLE_DEBUG_ENV = $(ENABLE_DEBUG_ENV)
 !if defined(RJIT_SUPPORT)
 RJIT_SUPPORT = $(RJIT_SUPPORT)
 !endif
+!if defined(XINCFLAGS)
+CPPFLAGS = $(XINCFLAGS)
+!endif
+!if defined(XLDFLAGS)
+XLDFLAGS = $(XLDFLAGS)
+!endif
 
 # TOOLS
 <<
@@ -79,8 +85,13 @@ RJIT_SUPPORT = $(RJIT_SUPPORT)
 	@echo HAVE_GIT = $(HAVE_GIT)>> $(MAKEFILE)
 !endif
 
-!if "$(WITH_GMP)" == "yes"
-	@echo>>$(MAKEFILE) USE_GMP = 1
+!if "$(WITH_GMP)" != "no"
+	@($(CC) $(XINCFLAGS) <<conftest.c -link $(XLDFLAGS) gmp.lib > nul && (echo USE_GMP = yes) || (echo USE_GMP = no)) >>$(MAKEFILE)
+#include <gmp.h>
+mpz_t x;
+int main(void) {mpz_init(x); return 0;}
+<<
+	@$(WIN32DIR:/=\)\rm.bat conftest.*
 !endif
 
 -osname-section-: