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build: make CURL_FORMAT_CURL_OFF_T[U] work with mingw-w64 <=7.0.0

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Add tweak for mingw-w64 when building tests/http/client programs to
avoid a bogus `-Wformat` warning when using mingw-w64 v7.0.0 or older.
The warning is bogus because these programs use curl's `printf()`
implementation that is guaranteed to support that format spec.

Add this for both CMake and autotools. (But only CMake is CI tested with
an old toolchain.)

Apply the workaround to `docs/examples`, and fix an example to use
curl's `printf()` with `CURL_FORMAT_CURL_OFF_T`.

Reintroduce curl `printf()` calls into `tests/http/client`, via #14625.
Also restore large number masks to a printf, changed earlier in #14382.

Follow-up to 232302f88a #14382
Ref: https://github.com/curl/curl/pull/14625#issuecomment-2302361737

Closes #14640
This commit is contained in:
Viktor Szakats 2024-08-22 00:21:51 +02:00
parent c04504885d
commit c730c8549b
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12 changed files with 60 additions and 43 deletions
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5
docs/examples/Makefile.am
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@ -46,6 +46,11 @@ if USE_CPPFLAG_CURL_STATICLIB
AM_CPPFLAGS += -DCURL_STATICLIB
endif
if HAVE_MINGW
# For mingw-w64 7.0.0 and earlier to avoid '-Wformat='
AM_CPPFLAGS += -D__USE_MINGW_ANSI_STDIO=1
endif
# Prevent LIBS from being used for all link targets
LIBS = $(BLANK_AT_MAKETIME)