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0855f30709
Previous minimum was: 1.2.4 (2002-02-28) - assume `gssapi/gssapi.h` header for MIT Kerberos. Drop logic detecting this header, and drop alternate logic including a bare "gssapi.h". Bare `gssapi.h` is Heimdal-specific. MIT Kerberos added support for it for Heimdal compatibility on 2006-11-09, redirecting to `gssapi/gssapi.h`. MIT Kerberos supported the latter header in the 1990s already. Ref:40e1a016f9(2008-03-06) Ref:d119352001(2006-11-09) - configure.ac: stop using `HAVE_GSSAPI_GSSAPI_H`. Added in 2010 to support "ancient distros such as RHEL-3" where `gssapi/gssapi_krb5.h` did not include `gssapi/gssapi.h`. MIT Kerberos includes it since commit:d9e959edfa(2003-03-06) Released in 1.3 (2003-07-08). Bump minimum required version to avoid this issue. Revertscca192e58f(2010-04-16) Ref: https://web.mit.edu/kerberos/dist/historic.html Ref: https://sources.debian.org/src/krb5/ Closes #18992
63 lines
1.7 KiB
Markdown
63 lines
1.7 KiB
Markdown
<!--
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Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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-->
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# curl internals
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The canonical libcurl internals documentation is now in the [everything
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curl](https://everything.curl.dev/internals) book. This file lists supported
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versions of libs and build tools.
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## Portability
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We write curl and libcurl to compile with C89 compilers on 32-bit and up
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machines. Most of libcurl assumes more or less POSIX compliance but that is
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not a requirement.
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We write libcurl to build and work with lots of third party tools, and we
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want it to remain functional and buildable with these and later versions
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(older versions may still work but is not what we work hard to maintain):
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## Dependencies
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We aim to support these or later versions.
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- OpenSSL 1.0.2a
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- LibreSSL 2.9.1
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- GnuTLS 3.1.10
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- mbedTLS 3.2.0
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- zlib 1.2.5.2
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- libssh2 1.9.0
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- c-ares 1.6.0
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- libssh 0.9.0
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- libidn2 2.0.0
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- wolfSSL 3.4.6
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- OpenLDAP 2.0
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- MIT Kerberos 1.3
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- nghttp2 1.15.0
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## Build tools
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When writing code (mostly for generating stuff included in release tarballs)
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we use a few "build tools" and we make sure that we remain functional with
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these versions:
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- GNU Libtool 1.4.2
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- GNU Autoconf 2.59
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- GNU Automake 1.7
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- GNU M4 1.4
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- perl 5.8
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- roffit 0.5
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- cmake 3.7
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Library Symbols
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===============
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All symbols used internally in libcurl must use a `Curl_` prefix if they are
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used in more than a single file. Single-file symbols must be made static.
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Public ("exported") symbols must use a `curl_` prefix. Public API functions
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are marked with `CURL_EXTERN` in the public header files so that all others
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can be hidden on platforms where this is possible.
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