build: drop Windows CE / CeGCC support

Windows CE support was limited to successful builds with ming32ce
(a toolchain that hasn't seen an update since 2009, using an ancient gcc
version and "old mingw"-style SDK headers, that curl deprecated earlier).
Builds with MSVC were broken for a long time. mingw32ce builds were never
actually tested and runtime and unlikely to work due to missing stubs.
Windows CE toolchains also miss to comply with C89. Paired with lack of
demand and support for the platform, curl deprecated it earlier.

This patch removes support from the codebase to ease maintaining Windows
codepaths.

Follow-up to f98c0ba834 #17924
Follow-up to 8491e6574c #17379
Follow-up to 2a292c3984 #15975

Closes #17927

docs/DEPRECATE.md

@@ -12,13 +12,6 @@ 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.
 
-## Windows CE
-
-Windows CE "mainstream support" ended on October 9, 2018, and "Extended
-Support" ended on October 10, 2023.
-
-curl drops all support in November 2025.
-
 ## VS2008
 
 curl drops support for getting built with Microsoft Visual Studio 2008 in
@@ -100,3 +93,4 @@ Support for RTMP in libcurl gets removed in April 2026.
  - BearSSL (removed in 8.15.0)
  - msh3 (removed in 8.16.0)
  - winbuild build system (removed in 8.17.0)
+ - Windows CE (removed in 8.18.0)

docs/INSTALL.md

@@ -650,7 +650,7 @@ This is a probably incomplete list of known CPU architectures and operating
 systems that curl has been compiled for. If you know a system curl compiles
 and runs on, that is not listed, please let us know.
 
-## 109 Operating Systems
+## 108 Operating Systems
 
     AIX, AmigaOS, Android, ArcaOS, Aros, Atari FreeMiNT, Azure Sphere, BeOS,
     Blackberry 10, Blackberry Tablet OS, Cell OS, Cesium, CheriBSD, Chrome OS,
@@ -665,7 +665,7 @@ and runs on, that is not listed, please let us know.
     SINIX-Z, SkyOS, SmartOS, Solaris, Sortix, SunOS, Syllable OS, Symbian,
     Tizen, TPF, Tru64, tvOS, ucLinux, Ultrix, UNICOS, UnixWare, visionOS, VMS,
     vxWorks, watchOS, Wear OS, WebOS, Wii System Software, Wii U, Windows,
-    Windows CE, Xbox System, Xenix, z/OS, z/TPF, z/VM, z/VSE, Zephyr
+    Xbox System, Xenix, z/OS, z/TPF, z/VM, z/VSE, Zephyr
 
 ## 28 CPU Architectures
 

docs/examples/anyauthput.c

@@ -103,12 +103,7 @@ int main(int argc, char **argv)
   if(!fp)
     return 2;
 
-#ifdef UNDER_CE
-  /* !checksrc! disable BANNEDFUNC 1 */
-  if(stat(file, &file_info) != 0) {
-#else
   if(fstat(fileno(fp), &file_info) != 0) {
-#endif
     fclose(fp);
     return 1; /* cannot continue */
   }

docs/examples/block_ip.c

@@ -29,7 +29,7 @@
  * filter IP addresses.
  */
 
-#if defined(__AMIGA__) || defined(UNDER_CE)
+#ifdef __AMIGA__
 #include <stdio.h>
 int main(void) { printf("Platform not supported.\n"); return 1; }
 #else

docs/examples/externalsocket.c

@@ -46,11 +46,7 @@
 #include <unistd.h>           /*  misc. Unix functions      */
 #endif
 
-#ifdef UNDER_CE
-#define strerror(e) "?"
-#else
 #include <errno.h>
-#endif
 
 /* The IP address and port number to connect to */
 #define IPADDR "127.0.0.1"

docs/examples/fileupload.c

@@ -57,12 +57,7 @@ int main(void)
   }
 
   /* to get the file size */
-#ifdef UNDER_CE
-  /* !checksrc! disable BANNEDFUNC 1 */
-  if(stat("debugit", &file_info) != 0) {
-#else
   if(fstat(fileno(fd), &file_info) != 0) {
-#endif
     fclose(fd);
     curl_global_cleanup();
     return 1; /* cannot continue */

docs/examples/ftpupload.c

@@ -28,11 +28,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
-#ifdef UNDER_CE
-#define strerror(e) "?"
-#else
 #include <errno.h>
-#endif
 #ifdef _WIN32
 #include <io.h>
 #undef stat
@@ -95,12 +91,7 @@ int main(void)
   }
 
   /* to get the file size */
-#ifdef UNDER_CE
-  /* !checksrc! disable BANNEDFUNC 1 */
-  if(stat(LOCAL_FILE, &file_info) != 0) {
-#else
   if(fstat(fileno(hd_src), &file_info) != 0) {
-#endif
     fclose(hd_src);
     return 1; /* cannot continue */
   }

docs/examples/ftpuploadresume.c

@@ -77,9 +77,7 @@ static int upload(CURL *curl, const char *remotepath,
 
   f = fopen(localpath, "rb");
   if(!f) {
-#ifndef UNDER_CE
     perror(NULL);
-#endif
     return 0;
   }
 

docs/examples/http2-download.c

@@ -28,11 +28,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#ifdef UNDER_CE
-#define strerror(e) "?"
-#else
 #include <errno.h>
-#endif
 
 #if defined(_MSC_VER) && (_MSC_VER < 1900)
 #define snprintf _snprintf

docs/examples/http2-upload.c

@@ -30,11 +30,7 @@
 #include <string.h>
 #include <fcntl.h>
 #include <sys/stat.h>
-#ifdef UNDER_CE
-#define strerror(e) "?"
-#else
 #include <errno.h>
-#endif
 
 /* somewhat Unix-specific */
 #ifndef _MSC_VER
@@ -231,14 +227,9 @@ static int setup(struct input *t, int num, const char *upload)
     return 1;
   }
 
-#ifdef UNDER_CE
-  /* !checksrc! disable BANNEDFUNC 1 */
-  if(stat(upload, &file_info) != 0) {
-#else
   if(fstat(fileno(t->in), &file_info) != 0) {
-#endif
-    fprintf(stderr, "error: could not stat file %s: %s\n",
-            upload, strerror(errno));
+    fprintf(stderr, "error: could not stat file %s: %s\n", upload,
+            strerror(errno));
     fclose(t->out);
     t->out = NULL;
     return 1;

docs/examples/httpput.c

@@ -90,12 +90,7 @@ int main(int argc, char **argv)
     return 2;
 
   /* get the file size of the local file */
-#ifdef UNDER_CE
-  /* !checksrc! disable BANNEDFUNC 1 */
-  if(stat(file, &file_info) != 0) {
-#else
   if(fstat(fileno(hd_src), &file_info) != 0) {
-#endif
     fclose(hd_src);
     return 1; /* cannot continue */
   }

docs/examples/log_failed_transfers.c

@@ -32,9 +32,7 @@
  *
  */
 
-#ifndef UNDER_CE
 #include <errno.h>
-#endif
 #include <stdio.h>
 #include <stdlib.h>
 #include <limits.h>
@@ -156,7 +154,7 @@ static int mem_addf(struct mem *mem, const char *format, ...)
       return x;
     }
 
-#if defined(_WIN32) && !defined(UNDER_CE)
+#ifdef _WIN32
     /* Not all versions of Windows CRT vsnprintf are compliant with C99. Some
        return -1 if buffer too small. Try _vscprintf to get the needed size. */
     if(!i && x < 0) {
@@ -297,11 +295,9 @@ int main(void)
       }
     }
     else {
-#ifndef UNDER_CE
       mem_addf(&t->log, "Failed to create body output file %s: %s\n",
                t->bodyfile, strerror(errno));
       fprintf(stderr, "%s", t->log.recent);
-#endif
       failed = 1;
     }
 
@@ -310,12 +306,10 @@ int main(void)
 
       if(fp && t->log.len == fwrite(t->log.buf, 1, t->log.len, fp))
         fprintf(stderr, "Transfer log written to %s\n", t->logfile);
-#ifndef UNDER_CE
       else {
         fprintf(stderr, "Failed to write transfer log to %s: %s\n",
                 t->logfile, strerror(errno));
       }
-#endif
 
       if(fp)
         fclose(fp);

docs/examples/sftpuploadresume.c

@@ -92,9 +92,7 @@ static int sftpResumeUpload(CURL *curl, const char *remotepath,
 
   f = fopen(localpath, "rb");
   if(!f) {
-#ifndef UNDER_CE
     perror(NULL);
-#endif
     return 0;
   }
 
@@ -103,7 +101,7 @@ static int sftpResumeUpload(CURL *curl, const char *remotepath,
   curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_cb);
   curl_easy_setopt(curl, CURLOPT_READDATA, f);
 
-#if defined(_WIN32) && !defined(UNDER_CE)
+#ifdef _WIN32
   _fseeki64(f, remoteFileSizeByte, SEEK_SET);
 #else
   fseek(f, (long)remoteFileSizeByte, SEEK_SET);