mingw: delete support for legacy mingw.org toolchain

Drop support for "old" / "legacy" / "classic" / "v1" / "mingw32" MinGW:
  https://en.wikipedia.org/wiki/MinGW, https://osdn.net/projects/mingw/
Its homepage used to be http://mingw.org/ [no HTTPS], and broken now.
It supported the x86 CPU only and used a old Windows API header and
implib set, often causing issues. It also misses most modern Windows
features, offering old versions of both binutils and gcc (no llvm/clang
support). It was last updated 2 years ago.

curl now relies on toolchains based on the mingw-w64 project:
https://www.mingw-w64.org/  https://sourceforge.net/projects/mingw-w64/
https://www.msys2.org/  https://github.com/msys2/msys2
https://github.com/mstorsjo/llvm-mingw
(Also available via Linux and macOS package managers.)

Closes curl#11625

.azure-pipelines.yml

@@ -237,12 +237,6 @@ stages:
           prepare: pacman -S --needed --noconfirm --noprogressbar libssh-devel mingw-w64-x86_64-libssh
           configure: --host=x86_64-w64-mingw32 --build=x86_64-w64-mingw32 --prefix=/mingw64 --enable-debug --enable-werror --with-libssh --with-openssl
           tests: "~571 ~614"
-        v1_mingw:
-          name: 32-bit (legacy)
-          container_img: ghcr.io/mback2k/curl-docker-winbuildenv/msys1-mingw:ltsc2019
-          container_cmd: C:\MinGW\msys\1.0\bin\sh
-          configure: --host=i686-pc-mingw32 --build=i686-pc-mingw32 --prefix=/mingw --enable-debug --without-ssl --with-mingw1-deprecated
-          tests: "!203 !1143"
         v1_mingw32:
           name: 32-bit w/o zlib
           container_img: ghcr.io/mback2k/curl-docker-winbuildenv/msys1-mingw32:ltsc2019
@@ -269,12 +263,6 @@ stages:
           prepare: pacman -S --needed --noconfirm --noprogressbar libssh2-devel mingw-w64-x86_64-libssh2
           configure: --host=x86_64-w64-mingw32 --build=x86_64-w64-mingw32 --prefix=/mingw64 --enable-debug --enable-werror --enable-sspi --with-schannel --with-winidn --with-libssh2
           tests: "~571"
-        v1_mingw_schannel:
-          name: 32-bit Schannel/SSPI/WinIDN (legacy)
-          container_img: ghcr.io/mback2k/curl-docker-winbuildenv/msys1-mingw:ltsc2019
-          container_cmd: C:\MinGW\msys\1.0\bin\sh
-          configure: --host=i686-pc-mingw32 --build=i686-pc-mingw32 --prefix=/mingw --enable-debug --enable-sspi --with-schannel --with-winidn --with-mingw1-deprecated
-          tests: "!203 !305 !311 !312 !313 !404 !1143 !2033 !2035 !2038 !2041 !2042 !2048 !2070 !2079 !2087 !3023 !3024"
         v1_mingw32_schannel:
           name: 32-bit Schannel/SSPI/WinIDN w/o zlib
           container_img: ghcr.io/mback2k/curl-docker-winbuildenv/msys1-mingw32:ltsc2019

CMakeLists.txt

@@ -385,19 +385,6 @@ if(WIN32)
   if(USE_LIBRTMP)
     list(APPEND CURL_LIBS "winmm")
   endif()
-
-  # Matching logic used for Curl_win32_random()
-  if(MINGW)
-    check_c_source_compiles("
-      #include <_mingw.h>
-      #if defined(__MINGW64_VERSION_MAJOR)
-      #error
-      #endif
-      int main(void) {
-        return 0;
-      }"
-      HAVE_MINGW_ORIGINAL)
-  endif()
 endif()
 
 # check SSL libraries
@@ -488,9 +475,7 @@ if(CURL_USE_OPENSSL)
 
   if(WIN32)
     list(APPEND CURL_LIBS "ws2_32")
-    if(NOT HAVE_MINGW_ORIGINAL)
-      list(APPEND CURL_LIBS "bcrypt")  # for OpenSSL/LibreSSL
-    endif()
+    list(APPEND CURL_LIBS "bcrypt")  # for OpenSSL/LibreSSL
   endif()
 
   set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
@@ -595,9 +580,7 @@ macro(openssl_check_symbol_exists SYMBOL FILES VARIABLE)
     endif()
     if(WIN32)
       list(APPEND CMAKE_REQUIRED_LIBRARIES "ws2_32")
-      if(NOT HAVE_MINGW_ORIGINAL)
-        list(APPEND CMAKE_REQUIRED_LIBRARIES "bcrypt")  # for OpenSSL/LibreSSL
-      endif()
+      list(APPEND CMAKE_REQUIRED_LIBRARIES "bcrypt")  # for OpenSSL/LibreSSL
     endif()
   elseif(USE_WOLFSSL)
     set(CMAKE_REQUIRED_INCLUDES   "${WolfSSL_INCLUDE_DIRS}")
@@ -1360,11 +1343,7 @@ if(WIN32)
     list(APPEND CURL_LIBS "advapi32" "crypt32")
   endif()
 
-  if(NOT HAVE_MINGW_ORIGINAL)
-    list(APPEND CURL_LIBS "bcrypt")
-  else()
-    set(HAVE_FTRUNCATE OFF)
-  endif()
+  list(APPEND CURL_LIBS "bcrypt")
 endif()
 
 if(MSVC)

appveyor.yml

@@ -188,21 +188,6 @@ environment:
         ADD_PATH: "C:\\mingw-w64\\i686-6.3.0-posix-dwarf-rt_v5-rev1\\mingw32\\bin;C:\\msys64\\usr\\bin"
         MSYS2_ARG_CONV_EXCL: "/*"
         BUILD_OPT: -k
-      - job_name: "CMake, mingw, Debug x86, no SSL, Static"
-        APPVEYOR_BUILD_WORKER_IMAGE: "Visual Studio 2022"
-        BUILD_SYSTEM: CMake
-        PRJ_GEN: "MSYS Makefiles"
-        PRJ_CFG: Debug
-        OPENSSL: OFF
-        SCHANNEL: OFF
-        ENABLE_UNICODE: OFF
-        HTTP_ONLY: OFF
-        TESTING: ON
-        SHARED: OFF
-        DISABLED_TESTS: "!1139 !1501"
-        ADD_PATH: "C:\\MinGW\\bin;C:\\msys64\\usr\\bin"
-        MSYS2_ARG_CONV_EXCL: "/*"
-        BUILD_OPT: -k
       # winbuild-based builds
       - job_name: "winbuild, VS2015, Debug"
         APPVEYOR_BUILD_WORKER_IMAGE: "Visual Studio 2015"

configure.ac

@@ -579,67 +579,6 @@ else
 fi
 AM_CONDITIONAL(BUILD_UNITTESTS, test x$want_unittests = xyes)
 
-# For original MinGW (ie not MinGW-w64) define the Windows minimum supported OS
-# version to Windows XP (0x501) if it hasn't already been defined by the user.
-# Without this override original MinGW defaults the version to Windows NT 4.0.
-# Note original MinGW sets _WIN32_WINNT if not defined to whatever WINVER is.
-case $host in
-  *-*-mingw32*)
-    AC_MSG_CHECKING([if MinGW minimum supported OS should be set to XP])
-    AC_COMPILE_IFELSE([
-      AC_LANG_PROGRAM([[
-#include <_mingw.h>
-      ]],[[
-#if defined(__MINGW64_VERSION_MAJOR) || \
-    defined(WINVER) || \
-    defined(_WIN32_WINNT)
-#error
-#endif
-      ]])
-    ],[
-      CPPFLAGS="$CPPFLAGS -DWINVER=0x501"
-      AC_MSG_RESULT([yes])
-    ],[
-      AC_MSG_RESULT([no])
-    ])
-    ;;
-esac
-
-# Detect original MinGW (not MinGW-w64)
-curl_mingw_original=no
-case $host in
-  *-*-mingw32*)
-    AC_MSG_CHECKING([using original MinGW (not MinGW-w64)])
-    AC_COMPILE_IFELSE([
-      AC_LANG_PROGRAM([[
-#include <_mingw.h>
-      ]],[[
-#if defined(__MINGW64_VERSION_MAJOR)
-#error
-#endif
-      ]])
-    ],[
-      curl_mingw_original=yes
-      curl_mingw_die=yes
-      AC_MSG_RESULT([yes])
-    ],[
-      AC_MSG_RESULT([no])
-    ])
-    ;;
-esac
-
-
-AC_ARG_WITH(mingw1-deprecated,dnl
-AS_HELP_STRING([--with-mingw1-deprecated],[confirm you realize support for mingw v1 is dying]),
-  if test X"$withval" != Xno; then
-    curl_mingw_die=
-  fi
-)
-
-if test -n "$curl_mingw_die"; then
-  AC_MSG_ERROR([support for mingw v1 is going away, enable temporarily with --with-mingw1-deprecated])
-fi
-
 dnl **********************************************************************
 dnl Compilation based checks should not be done before this point.
 dnl **********************************************************************
@@ -2080,8 +2019,7 @@ if test "x$USE_WIN32_CRYPTO" = "x1" -o "x$USE_SCHANNEL" = "x1"; then
 fi
 
 dnl link bcrypt for BCryptGenRandom() (used when building for Vista or newer)
-if test "x$curl_cv_native_windows" = "xyes" &&
-   test "x$curl_mingw_original" = "xno"; then
+if test "x$curl_cv_native_windows" = "xyes"; then
   LIBS="-lbcrypt $LIBS"
 fi
 

docs/DEPRECATE.md

@@ -6,18 +6,6 @@ email the
 as soon as possible and explain to us why this is a problem for you and
 how your use case cannot be satisfied properly using a workaround.
 
-## mingw v1
-
-We remove support for building curl with the original legacy mingw version 1
-in September 2023.
-
-During the deprecation period you can enable the support with the configure
-option `--with-mingw1-deprecated`.
-
-mingw version 1 is old and deprecated software. There are much better and
-still support build environments to use to build curl and other software. For
-example [MinGW-w64](https://www.mingw-w64.org/).
-
 ## space-separated `NOPROXY` patterns
 
 When specifying patterns/domain names for curl that should *not* go through a
@@ -46,3 +34,4 @@ curl will remove the support for space-separated names in July 2024.
  - Support for systems without 64 bit data types
  - NSS
  - gskit
+ - mingw v1

docs/INSTALL.md

@@ -183,12 +183,12 @@ multi-threaded dynamic C runtime.
 
  If you get linkage errors read section 5.7 of the FAQ document.
 
-## MinGW32
+## mingw-w64
 
-Make sure that MinGW32's bin directory is in the search path, for example:
+Make sure that mingw-w64's bin directory is in the search path, for example:
 
 ```cmd
-set PATH=c:\mingw32\bin;%PATH%
+set PATH=c:\mingw-w64\bin;%PATH%
 ```
 
 then run `mingw32-make mingw32` in the root dir. There are other
@@ -246,7 +246,7 @@ Requires DJGPP in the search path and pointing to the Watt-32 stack via
 
 Run `make -f Makefile.dist djgpp` in the root curl dir.
 
-For build configuration options, please see the MinGW32 section.
+For build configuration options, please see the mingw-w64 section.
 
 Notes:
 
@@ -261,7 +261,7 @@ Notes:
 
 Run `make -f Makefile.dist amiga` in the root curl dir.
 
-For build configuration options, please see the MinGW32 section.
+For build configuration options, please see the mingw-w64 section.
 
 ## Disabling Specific Protocols in Windows builds
 

lib/config-win32.h

@@ -39,15 +39,13 @@
 #define HAVE_FCNTL_H 1
 
 /* Define to 1 if you have the <inttypes.h> header file. */
-#if defined(__MINGW32__) || \
-    (defined(_MSC_VER) && (_MSC_VER >= 1800))
+#if (defined(_MSC_VER) && (_MSC_VER >= 1800)) || defined(__MINGW32__)
 #define HAVE_INTTYPES_H 1
 #endif
 
 /* Define to 1 if you have the <stdint.h> header file. */
-#if defined(__MINGW32__) || defined(__POCC__) || \
-    (defined(_MSC_VER) && (_MSC_VER >= 1600)) || \
-    (defined(__BORLANDC__) && (__BORLANDC__ >= 0x0582))
+#if (defined(_MSC_VER) && (_MSC_VER >= 1600)) || defined(__MINGW32__) || \
+    (defined(__BORLANDC__) && (__BORLANDC__ >= 0x0582)) || defined(__POCC__)
 #define HAVE_STDINT_H 1
 #endif
 
@@ -72,8 +70,7 @@
 #define HAVE_SIGNAL_H 1
 
 /* Define to 1 if you have the <stdbool.h> header file. */
-#if (defined(_MSC_VER) && (_MSC_VER >= 1800)) || \
-    defined(__MINGW64_VERSION_MAJOR)
+#if (defined(_MSC_VER) && (_MSC_VER >= 1800)) || defined(__MINGW32__)
 #define HAVE_STDBOOL_H 1
 #endif
 
@@ -140,7 +137,7 @@
 #define HAVE_STRING_H 1
 
 /* Define to 1 if you have the <libgen.h> header file. */
-#if defined(__MINGW64_VERSION_MAJOR)
+#if defined(__MINGW32__)
 #define HAVE_LIBGEN_H 1
 #endif
 
@@ -155,8 +152,7 @@
 /* #define TIME_WITH_SYS_TIME 1 */
 
 /* Define to 1 if bool is an available type. */
-#if (defined(_MSC_VER) && (_MSC_VER >= 1800)) || \
-    defined(__MINGW64_VERSION_MAJOR)
+#if (defined(_MSC_VER) && (_MSC_VER >= 1800)) || defined(__MINGW32__)
 #define HAVE_BOOL_T 1
 #endif
 
@@ -168,7 +164,7 @@
 #define HAVE_CLOSESOCKET 1
 
 /* Define if you have the ftruncate function. */
-#if defined(__MINGW64_VERSION_MAJOR)
+#if defined(__MINGW32__)
 #define HAVE_FTRUNCATE 1
 #endif
 
@@ -203,7 +199,7 @@
 #define HAVE_SOCKET 1
 
 /* Define if you have the strcasecmp function. */
-#ifdef __MINGW32__
+#if defined(__MINGW32__)
 #define HAVE_STRCASECMP 1
 #endif
 
@@ -276,12 +272,12 @@
 #endif
 
 /* Define to 1 if you have the `basename' function. */
-#if defined(__MINGW64_VERSION_MAJOR)
+#if defined(__MINGW32__)
 #define HAVE_BASENAME 1
 #endif
 
 /* Define to 1 if you have the strtok_r function. */
-#if defined(__MINGW64_VERSION_MAJOR)
+#if defined(__MINGW32__)
 #define HAVE_STRTOK_R 1
 #endif
 
@@ -411,11 +407,9 @@
 #define _CRT_NONSTDC_NO_DEPRECATE 1
 #endif
 
-/* mingw-w64, mingw using >= MSVCR80, and visual studio >= 2005 (MSVCR80)
+/* mingw-w64 and visual studio >= 2005 (MSVCR80)
    all default to 64-bit time_t unless _USE_32BIT_TIME_T is defined */
-#if defined(__MINGW64_VERSION_MAJOR) || \
-    (defined(__MINGW32__) && (__MSVCRT_VERSION__ >= 0x0800)) || \
-    (defined(_MSC_VER) && (_MSC_VER >= 1400))
+#if (defined(_MSC_VER) && (_MSC_VER >= 1400)) || defined(__MINGW32__)
 #  ifndef _USE_32BIT_TIME_T
 #    define SIZEOF_TIME_T 8
 #  else
@@ -564,14 +558,14 @@ Vista
 #endif
 
 /* Number of bits in a file offset, on hosts where this is settable. */
-#if defined(USE_WIN32_LARGE_FILES) && defined(__MINGW64_VERSION_MAJOR)
+#if defined(USE_WIN32_LARGE_FILES) && defined(__MINGW32__)
 #  ifndef _FILE_OFFSET_BITS
 #  define _FILE_OFFSET_BITS 64
 #  endif
 #endif
 
 /* Define to the size of `off_t', as computed by sizeof. */
-#if defined(__MINGW64_VERSION_MAJOR) && \
+#if defined(__MINGW32__) && \
   defined(_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
 #  define SIZEOF_OFF_T 8
 #else

lib/curl_setup.h

@@ -28,11 +28,6 @@
 #define CURL_NO_OLDIES
 #endif
 
-/* define mingw version macros, eg __MINGW{32,64}_{MINOR,MAJOR}_VERSION */
-#ifdef __MINGW32__
-#include <_mingw.h>
-#endif
-
 /*
  * Disable Visual Studio warnings:
  * 4127 "conditional expression is constant"
@@ -830,9 +825,6 @@ int getpwuid_r(uid_t uid, struct passwd *pwd, char *buf,
 #endif
 
 #if defined(USE_UNIX_SOCKETS) && defined(WIN32)
-#  if defined(__MINGW32__) && !defined(LUP_SECURE)
-     typedef u_short ADDRESS_FAMILY; /* Classic mingw, 11y+ old mingw-w64 */
-#  endif
 #  if !defined(UNIX_PATH_MAX)
      /* Replicating logic present in afunix.h
         (distributed with newer Windows 10 SDK versions only) */