Change #256567

Comments

build: assume `stdint.h`

curl requires `stdint.h` from C99, and no longer builds without it since
v8.18.0 (after dropping VS2008 support). Assume it's available, drop
feature checks.

Also:
- drop duplicate `stdint.h` includes.
- introduce internal `HAVE_UINTPTR_T`, enabled by default.
- OS400: disable `HAVE_UINTPTR_T`.
- build: keep cmake pre-fill and `cmp-config.pl` exception because cmake
  and autotools both detect `stdint.h` implicitly.

Co-authored-by: Dan Fandrich
Ref: #20405
Ref: #20384
Follow-up to 2e1a045d8985e5daa4d9a4f908ed870a16d8e41e #17931

Closes #20406

Changed files

• CMakeLists.txt
• configure.ac
• lib/config-win32.h
• lib/curl_config-cmake.h.in
• lib/curl_setup.h
• lib/curl_setup_once.h
• lib/curlx/timeval.c
• lib/doh.h
• lib/dynhds.h
• lib/formdata.c
• lib/hostip.h
• lib/http.h
• lib/http2.c
• lib/vtls/cipher_suite.h