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8db0e286b3
- drop x-hacks for curl internal variables and certain autotools ones that do not hold custom values. - make x-hacks consistently use `"x$var" = "xval"` style. - add a few x-hacks for input/external variables that may hold custom values. - prefer `-z` and `-n` to test empty/non-empty. This also makes some x-hacks unnecessary. - optimized negated test `-z` and `-n` options. - prefer `&&` and `||` over `-a` and `-o`. For better POSIX compatibility: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html - quote variables passed to `test`, where missing. - quote string literals in comparisons. - fix some indentation, whitespace. Note that a few `case` statements also use the x-hack, which looks unnecessary. This patch does not change them. Verified by comparing feature detection results with a reference CI run from before this patch (PR #19922). Refs: https://www.shellcheck.net/wiki/SC2268 https://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html https://www.vidarholen.net/contents/blog/?p=1035 https://mywiki.wooledge.org/BashPitfalls#A.5B_.24foo_.3D_.22bar.22_.5D Closes #18189 |
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| .. | ||
| .gitignore | ||
| curl-amissl.m4 | ||
| curl-apple-sectrust.m4 | ||
| curl-compilers.m4 | ||
| curl-confopts.m4 | ||
| curl-functions.m4 | ||
| curl-gnutls.m4 | ||
| curl-mbedtls.m4 | ||
| curl-openssl.m4 | ||
| curl-override.m4 | ||
| curl-reentrant.m4 | ||
| curl-rustls.m4 | ||
| curl-schannel.m4 | ||
| curl-sysconfig.m4 | ||
| curl-wolfssl.m4 | ||
| xc-am-iface.m4 | ||
| xc-cc-check.m4 | ||
| xc-lt-iface.m4 | ||
| xc-val-flgs.m4 | ||
| zz40-xc-ovr.m4 | ||
| zz50-xc-ovr.m4 | ||