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-rw-r--r--gl/m4/gl-openssl.m476
1 files changed, 76 insertions, 0 deletions
diff --git a/gl/m4/gl-openssl.m4 b/gl/m4/gl-openssl.m4
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1# gl-openssl.m4 serial 6
2dnl Copyright (C) 2013-2022 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7AC_DEFUN([gl_SET_CRYPTO_CHECK_DEFAULT],
8[
9 m4_define([gl_CRYPTO_CHECK_DEFAULT], [$1])
10])
11gl_SET_CRYPTO_CHECK_DEFAULT([no])
12
13AC_DEFUN([gl_CRYPTO_CHECK],
14[
15 dnl gnulib users set this before gl_INIT with gl_SET_CRYPTO_CHECK_DEFAULT()
16 m4_divert_once([DEFAULTS], [with_openssl_default='gl_CRYPTO_CHECK_DEFAULT'])
17
18 dnl Only clear once, so crypto routines can be checked for individually
19 m4_divert_once([DEFAULTS], [LIB_CRYPTO=])
20
21 AC_ARG_WITH([openssl],
22 [[ --with-openssl[=ARG] use libcrypto hash routines for the hash functions
23 MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512.
24 Valid ARGs are:
25 'yes',
26 'no',
27 'auto' => use if any version available,
28 'auto-gpl-compat' => use if GPL compatible version
29 available,
30 'optional' => use if available
31 and warn if not available;
32 Default is ']gl_CRYPTO_CHECK_DEFAULT['.]m4_ifdef([gl_AF_ALG], [
33 Note also --with-linux-crypto, which will enable the
34 use of Linux kernel crypto routines (if available),
35 which has precedence for files.])],
36 [],
37 [with_openssl=$with_openssl_default])
38
39 AC_SUBST([LIB_CRYPTO])
40 if test "x$with_openssl" != xno; then
41 if test "x$with_openssl" = xauto-gpl-compat; then
42 AC_CACHE_CHECK([whether openssl is GPL compatible],
43 [gl_cv_openssl_gpl_compat],
44 [AC_COMPILE_IFELSE(
45 [AC_LANG_PROGRAM([[
46 #include <openssl/opensslv.h>
47 #if OPENSSL_VERSION_MAJOR < 3
48 #error "openssl >= version 3 not found"
49 #endif
50 ]])],
51 [gl_cv_openssl_gpl_compat=yes],
52 [gl_cv_openssl_gpl_compat=no])])
53 fi
54 if test "x$with_openssl" != xauto-gpl-compat ||
55 test "x$gl_cv_openssl_gpl_compat" = xyes; then
56 AC_CHECK_LIB([crypto], [$1],
57 [AC_CHECK_HEADERS(
58 m4_if([$1], [MD5], [openssl/md5.h], [openssl/sha.h]),
59 [LIB_CRYPTO=-lcrypto
60 AC_DEFINE([HAVE_OPENSSL_$1], [1],
61 [Define to 1 if libcrypto is used for $1.])])])
62 fi
63 if test "x$LIB_CRYPTO" = x; then
64 message='openssl development library not found for $1.
65 If you want to install it, first find the pre-built package name:
66 - On Debian and Debian-based systems: libssl-dev,
67 - On Red Hat distributions: openssl-devel.
68 - Other: https://repology.org/project/openssl/versions'
69 if test "x$with_openssl" = xyes; then
70 AC_MSG_ERROR([$message])
71 elif test "x$with_openssl" = xoptional; then
72 AC_MSG_WARN([$message])
73 fi
74 fi
75 fi
76])