1 | # =========================================================================== |
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2 | # http://www.gnu.org/software/autoconf-archive/ax_check_openssl.html |
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3 | # =========================================================================== |
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4 | # |
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5 | # SYNOPSIS |
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6 | # |
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7 | # AX_CHECK_OPENSSL([action-if-found[, action-if-not-found]]) |
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8 | # |
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9 | # DESCRIPTION |
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10 | # |
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11 | # Look for OpenSSL in a number of default spots, or in a user-selected |
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12 | # spot (via --with-openssl). Sets |
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13 | # |
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14 | # OPENSSL_INCLUDES to the include directives required |
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15 | # OPENSSL_LIBS to the -l directives required |
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16 | # OPENSSL_LDFLAGS to the -L or -R flags required |
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17 | # |
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18 | # and calls ACTION-IF-FOUND or ACTION-IF-NOT-FOUND appropriately |
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19 | # |
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20 | # This macro sets OPENSSL_INCLUDES such that source files should use the |
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21 | # openssl/ directory in include directives: |
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22 | # |
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23 | # #include <openssl/hmac.h> |
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24 | # |
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25 | # LICENSE |
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26 | # |
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27 | # Copyright (c) 2009,2010 Zmanda Inc. <http://www.zmanda.com/> |
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28 | # Copyright (c) 2009,2010 Dustin J. Mitchell <dustin@zmanda.com> |
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29 | # |
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30 | # Copying and distribution of this file, with or without modification, are |
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31 | # permitted in any medium without royalty provided the copyright notice |
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32 | # and this notice are preserved. This file is offered as-is, without any |
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33 | # warranty. |
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34 | |
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35 | #serial 8 |
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36 | |
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37 | AU_ALIAS([CHECK_SSL], [AX_CHECK_OPENSSL]) |
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38 | AC_DEFUN([AX_CHECK_OPENSSL], [ |
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39 | found=false |
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40 | AC_ARG_WITH([openssl], |
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41 | [AS_HELP_STRING([--with-openssl=DIR], |
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42 | [root of the OpenSSL directory])], |
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43 | [ |
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44 | case "$withval" in |
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45 | "" | y | ye | yes | n | no) |
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46 | AC_MSG_ERROR([Invalid --with-openssl value]) |
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47 | ;; |
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48 | *) ssldirs="$withval" |
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49 | ;; |
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50 | esac |
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51 | ], [ |
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52 | # if pkg-config is installed and openssl has installed a .pc file, |
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53 | # then use that information and don't search ssldirs |
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54 | AC_PATH_PROG([PKG_CONFIG], [pkg-config]) |
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55 | if test x"$PKG_CONFIG" != x""; then |
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56 | OPENSSL_LDFLAGS=`$PKG_CONFIG openssl --libs-only-L 2>/dev/null` |
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57 | if test $? = 0; then |
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58 | OPENSSL_LIBS=`$PKG_CONFIG openssl --libs-only-l 2>/dev/null` |
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59 | OPENSSL_INCLUDES=`$PKG_CONFIG openssl --cflags-only-I 2>/dev/null` |
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60 | # found=true |
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61 | fi |
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62 | fi |
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63 | |
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64 | # no such luck; use some default ssldirs |
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65 | if ! $found; then |
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66 | ssldirs="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /usr" |
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67 | fi |
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68 | ] |
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69 | ) |
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70 | |
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71 | |
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72 | # note that we #include <openssl/foo.h>, so the OpenSSL headers have to be in |
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73 | # an 'openssl' subdirectory |
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74 | |
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75 | if ! $found; then |
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76 | OPENSSL_INCLUDES= |
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77 | for ssldir in $ssldirs; do |
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78 | AC_MSG_CHECKING([for openssl/ssl.h in $ssldir]) |
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79 | if test -f "$ssldir/include/openssl/ssl.h"; then |
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80 | OPENSSL_INCLUDES="-I$ssldir/include" |
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81 | OPENSSL_LDFLAGS="-L$ssldir/lib" |
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82 | OPENSSL_LIBS="-lssl -lcrypto" |
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83 | found=true |
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84 | AC_MSG_RESULT([yes]) |
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85 | break |
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86 | else |
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87 | AC_MSG_RESULT([no]) |
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88 | fi |
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89 | done |
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90 | |
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91 | # if the file wasn't found, well, go ahead and try the link anyway -- maybe |
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92 | # it will just work! |
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93 | fi |
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94 | |
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95 | # try the preprocessor and linker with our new flags, |
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96 | # being careful not to pollute the global LIBS, LDFLAGS, and CPPFLAGS |
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97 | |
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98 | AC_MSG_CHECKING([whether compiling and linking against OpenSSL works]) |
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99 | echo "Trying link with OPENSSL_LDFLAGS=$OPENSSL_LDFLAGS;" \ |
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100 | "OPENSSL_LIBS=$OPENSSL_LIBS; OPENSSL_INCLUDES=$OPENSSL_INCLUDES" >&AS_MESSAGE_LOG_FD |
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101 | |
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102 | save_LIBS="$LIBS" |
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103 | save_LDFLAGS="$LDFLAGS" |
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104 | save_CPPFLAGS="$CPPFLAGS" |
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105 | LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS" |
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106 | LIBS="$OPENSSL_LIBS $LIBS" |
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107 | CPPFLAGS="$OPENSSL_INCLUDES $CPPFLAGS" |
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108 | AC_LINK_IFELSE( |
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109 | [AC_LANG_PROGRAM([#include <openssl/ssl.h>], [SSL_new(NULL)])], |
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110 | [ |
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111 | AC_MSG_RESULT([yes]) |
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112 | $1 |
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113 | ], [ |
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114 | AC_MSG_RESULT([no]) |
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115 | $2 |
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116 | ]) |
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117 | CPPFLAGS="$save_CPPFLAGS" |
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118 | LDFLAGS="$save_LDFLAGS" |
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119 | LIBS="$save_LIBS" |
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120 | |
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121 | AC_SUBST([OPENSSL_INCLUDES]) |
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122 | AC_SUBST([OPENSSL_LIBS]) |
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123 | AC_SUBST([OPENSSL_LDFLAGS]) |
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124 | ]) |
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125 | |
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