diff options
Diffstat (limited to 'm4/krb5-config.m4')
| -rw-r--r-- | m4/krb5-config.m4 | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/m4/krb5-config.m4 b/m4/krb5-config.m4 new file mode 100644 index 0000000..d73085f --- /dev/null +++ b/m4/krb5-config.m4 @@ -0,0 +1,101 @@ +dnl Use krb5-config to get link paths for Kerberos libraries. +dnl +dnl Provides one macro, RRA_KRB5_CONFIG, which attempts to get compiler and +dnl linker flags for a library via krb5-config and sets the appropriate shell +dnl variables. Defines the Autoconf variable PATH_KRB5_CONFIG, which can be +dnl used to find the default path to krb5-config. +dnl +dnl Depends on RRA_ENABLE_REDUCED_DEPENDS. +dnl +dnl The canonical version of this file is maintained in the rra-c-util +dnl package, available at <http://www.eyrie.org/~eagle/software/rra-c-util/>. +dnl +dnl Written by Russ Allbery <rra@stanford.edu> +dnl Copyright 2011, 2012 +dnl The Board of Trustees of the Leland Stanford Junior University +dnl +dnl This file is free software; the authors give unlimited permission to copy +dnl and/or distribute it, with or without modifications, as long as this +dnl notice is preserved. + +dnl Check for krb5-config in the user's path and set PATH_KRB5_CONFIG. This +dnl is moved into a separate macro so that it can be loaded via AC_REQUIRE, +dnl meaning it will only be run once even if we link with multiple krb5-config +dnl libraries. +AC_DEFUN([_RRA_KRB5_CONFIG_PATH], +[AC_ARG_VAR([PATH_KRB5_CONFIG], [Path to krb5-config]) + AC_PATH_PROG([PATH_KRB5_CONFIG], [krb5-config], [], + [${PATH}:/usr/kerberos/bin])]) + +dnl Check whether the --deps flag is supported by krb5-config. Takes the path +dnl to krb5-config to use. Note that this path is not embedded in the cache +dnl variable, so this macro implicitly assumes that we will always use the +dnl same krb5-config program. +AC_DEFUN([_RRA_KRB5_CONFIG_DEPS], +[AC_REQUIRE([_RRA_KRB5_CONFIG_PATH]) + AC_CACHE_CHECK([for --deps support in krb5-config], + [rra_cv_krb5_config_deps], + [AS_IF(["$1" 2>&1 | grep deps >/dev/null 2>&1], + [rra_cv_krb5_config_deps=yes], + [rra_cv_krb5_config_deps=no])])]) + +dnl Obtain the library flags for a particular library using krb5-config. +dnl Takes the path to the krb5-config program to use, the argument to +dnl krb5-config to use, and the variable prefix under which to store the +dnl library flags. +AC_DEFUN([_RRA_KRB5_CONFIG_LIBS], +[AC_REQUIRE([_RRA_KRB5_CONFIG_PATH]) + AC_REQUIRE([RRA_ENABLE_REDUCED_DEPENDS]) + _RRA_KRB5_CONFIG_DEPS([$1]) + AS_IF([test x"$rra_reduced_depends" = xfalse \ + && test x"$rra_cv_krb5_config_deps" = xyes], + [$3[]_LIBS=`"$1" --deps --libs $2 2>/dev/null`], + [$3[]_LIBS=`"$1" --libs $2 2>/dev/null`])]) + +dnl Attempt to find the flags for a library using krb5-config. Takes the +dnl following arguments (in order): +dnl +dnl 1. The root directory for the library in question, generally from an +dnl Autoconf --with flag. Used by preference as the path to krb5-config. +dnl +dnl 2. The argument to krb5-config to retrieve flags for this particular +dnl library. +dnl +dnl 3. The variable prefix to use when setting CPPFLAGS and LIBS variables +dnl based on the result of krb5-config. +dnl +dnl 4. Further actions to take if krb5-config was found and supported that +dnl library type. +dnl +dnl 5. Further actions to take if krb5-config could not be used to get flags +dnl for that library type. +dnl +dnl Special-case a krb5-config argument of krb5 and run krb5-config without an +dnl argument if that option was requested and not supported. Old versions of +dnl krb5-config didn't take an argument to specify the library type, but +dnl always returned the flags for libkrb5. +AC_DEFUN([RRA_KRB5_CONFIG], +[AC_REQUIRE([_RRA_KRB5_CONFIG_PATH]) + rra_krb5_config_$3= + rra_krb5_config_$3[]_ok= + AS_IF([test x"$1" != x && test -x "$1/bin/krb5-config"], + [rra_krb5_config_$3="$1/bin/krb5-config"], + [rra_krb5_config_$3="$PATH_KRB5_CONFIG"]) + AS_IF([test x"$rra_krb5_config_$3" != x && test -x "$rra_krb5_config_$3"], + [AC_CACHE_CHECK([for $2 support in krb5-config], [rra_cv_lib_$3[]_config], + [AS_IF(["$rra_krb5_config_$3" 2>&1 | grep $2 >/dev/null 2>&1], + [rra_cv_lib_$3[]_config=yes], + [rra_cv_lib_$3[]_config=no])]) + AS_IF([test "$rra_cv_lib_$3[]_config" = yes], + [$3[]_CPPFLAGS=`"$rra_krb5_config_$3" --cflags $2 2>/dev/null` + _RRA_KRB5_CONFIG_LIBS([$rra_krb5_config_$3], [$2], [$3]) + rra_krb5_config_$3[]_ok=yes], + [AS_IF([test x"$2" = xkrb5], + [$3[]_CPPFLAGS=`"$rra_krb5_config_$3" --cflags 2>/dev/null` + $3[]_LIBS=`"$rra_krb5_config_$3" --libs $2 2>/dev/null` + rra_krb5_config_$3[]_ok=yes])])]) + AS_IF([test x"$rra_krb5_config_$3[]_ok" = xyes], + [$3[]_CPPFLAGS=`echo "$$3[]_CPPFLAGS" | sed 's%-I/usr/include %%'` + $3[]_CPPFLAGS=`echo "$$3[]_CPPFLAGS" | sed 's%-I/usr/include$%%'` + $4], + [$5])]) |