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| 1 | +# =========================================================================== |
| 2 | +# http://www.gnu.org/software/autoconf-archive/ax_check_openssl.html |
| 3 | +# =========================================================================== |
| 4 | +# |
| 5 | +# SYNOPSIS |
| 6 | +# |
| 7 | +# AX_CHECK_OPENSSL([action-if-found[, action-if-not-found]]) |
| 8 | +# |
| 9 | +# DESCRIPTION |
| 10 | +# |
| 11 | +# Look for OpenSSL in a number of default spots, or in a user-selected |
| 12 | +# spot (via --with-openssl). Sets |
| 13 | +# |
| 14 | +# OPENSSL_INCLUDES to the include directives required |
| 15 | +# OPENSSL_LIBS to the -l directives required |
| 16 | +# OPENSSL_LDFLAGS to the -L or -R flags required |
| 17 | +# |
| 18 | +# and calls ACTION-IF-FOUND or ACTION-IF-NOT-FOUND appropriately |
| 19 | +# |
| 20 | +# This macro sets OPENSSL_INCLUDES such that source files should use the |
| 21 | +# openssl/ directory in include directives: |
| 22 | +# |
| 23 | +# #include <openssl/hmac.h> |
| 24 | +# |
| 25 | +# LICENSE |
| 26 | +# |
| 27 | +# Copyright (c) 2009,2010 Zmanda Inc. <http://www.zmanda.com/> |
| 28 | +# Copyright (c) 2009,2010 Dustin J. Mitchell <dustin@zmanda.com> |
| 29 | +# |
| 30 | +# Copying and distribution of this file, with or without modification, are |
| 31 | +# permitted in any medium without royalty provided the copyright notice |
| 32 | +# and this notice are preserved. This file is offered as-is, without any |
| 33 | +# warranty. |
| 34 | + |
| 35 | +#serial 8 |
| 36 | + |
| 37 | +AU_ALIAS([CHECK_SSL], [AX_CHECK_OPENSSL]) |
| 38 | +AC_DEFUN([AX_CHECK_OPENSSL], [ |
| 39 | + found=false |
| 40 | + AC_ARG_WITH([openssl], |
| 41 | + [AS_HELP_STRING([--with-openssl=DIR], |
| 42 | + [root of the OpenSSL directory])], |
| 43 | + [ |
| 44 | + case "$withval" in |
| 45 | + "" | y | ye | yes | n | no) |
| 46 | + AC_MSG_ERROR([Invalid --with-openssl value]) |
| 47 | + ;; |
| 48 | + *) ssldirs="$withval" |
| 49 | + ;; |
| 50 | + esac |
| 51 | + ], [ |
| 52 | + # if pkg-config is installed and openssl has installed a .pc file, |
| 53 | + # then use that information and don't search ssldirs |
| 54 | + AC_PATH_PROG([PKG_CONFIG], [pkg-config]) |
| 55 | + if test x"$PKG_CONFIG" != x""; then |
| 56 | + OPENSSL_LDFLAGS=`$PKG_CONFIG openssl --libs-only-L 2>/dev/null` |
| 57 | + if test $? = 0; then |
| 58 | + OPENSSL_LIBS=`$PKG_CONFIG openssl --libs-only-l 2>/dev/null` |
| 59 | + OPENSSL_INCLUDES=`$PKG_CONFIG openssl --cflags-only-I 2>/dev/null` |
| 60 | + found=true |
| 61 | + fi |
| 62 | + fi |
| 63 | +
|
| 64 | + # no such luck; use some default ssldirs |
| 65 | + if ! $found; then |
| 66 | + ssldirs="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /usr" |
| 67 | + fi |
| 68 | + ] |
| 69 | + ) |
| 70 | +
|
| 71 | +
|
| 72 | + # note that we #include <openssl/foo.h>, so the OpenSSL headers have to be in |
| 73 | + # an 'openssl' subdirectory |
| 74 | +
|
| 75 | + if ! $found; then |
| 76 | + OPENSSL_INCLUDES= |
| 77 | + for ssldir in $ssldirs; do |
| 78 | + AC_MSG_CHECKING([for openssl/ssl.h in $ssldir]) |
| 79 | + if test -f "$ssldir/include/openssl/ssl.h"; then |
| 80 | + OPENSSL_INCLUDES="-I$ssldir/include" |
| 81 | + OPENSSL_LDFLAGS="-L$ssldir/lib" |
| 82 | + OPENSSL_LIBS="-lssl -lcrypto" |
| 83 | + found=true |
| 84 | + AC_MSG_RESULT([yes]) |
| 85 | + break |
| 86 | + else |
| 87 | + AC_MSG_RESULT([no]) |
| 88 | + fi |
| 89 | + done |
| 90 | +
|
| 91 | + # if the file wasn't found, well, go ahead and try the link anyway -- maybe |
| 92 | + # it will just work! |
| 93 | + fi |
| 94 | +
|
| 95 | + # try the preprocessor and linker with our new flags, |
| 96 | + # being careful not to pollute the global LIBS, LDFLAGS, and CPPFLAGS |
| 97 | +
|
| 98 | + AC_MSG_CHECKING([whether compiling and linking against OpenSSL works]) |
| 99 | + echo "Trying link with OPENSSL_LDFLAGS=$OPENSSL_LDFLAGS;" \ |
| 100 | + "OPENSSL_LIBS=$OPENSSL_LIBS; OPENSSL_INCLUDES=$OPENSSL_INCLUDES" >&AS_MESSAGE_LOG_FD |
| 101 | +
|
| 102 | + save_LIBS="$LIBS" |
| 103 | + save_LDFLAGS="$LDFLAGS" |
| 104 | + save_CPPFLAGS="$CPPFLAGS" |
| 105 | + LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS" |
| 106 | + LIBS="$OPENSSL_LIBS $LIBS" |
| 107 | + CPPFLAGS="$OPENSSL_INCLUDES $CPPFLAGS" |
| 108 | + AC_LINK_IFELSE( |
| 109 | + [AC_LANG_PROGRAM([#include <openssl/ssl.h>], [SSL_new(NULL)])], |
| 110 | + [ |
| 111 | + AC_MSG_RESULT([yes]) |
| 112 | + $1 |
| 113 | + ], [ |
| 114 | + AC_MSG_RESULT([no]) |
| 115 | + $2 |
| 116 | + ]) |
| 117 | + CPPFLAGS="$save_CPPFLAGS" |
| 118 | + LDFLAGS="$save_LDFLAGS" |
| 119 | + LIBS="$save_LIBS" |
| 120 | +
|
| 121 | + AC_SUBST([OPENSSL_INCLUDES]) |
| 122 | + AC_SUBST([OPENSSL_LIBS]) |
| 123 | + AC_SUBST([OPENSSL_LDFLAGS]) |
| 124 | +]) |
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