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Fix FindBIND to be compatible w/ Linux & FreeBSD.

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This commit is contained in:
Jon Siwek 2010-11-01 10:48:17 -05:00
parent 5755d59f1d
commit 521c30e9ba
1 changed files with 37 additions and 18 deletions
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55
cmake/FindBIND.cmake
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@ -15,9 +15,8 @@
#
# BIND_FOUND System has BIND, include and library dirs found
# BIND_INCLUDE_DIR The BIND include directories.
# BIND_LIBRARIES All BIND libraries found.
# BIND_LIBRARY The BIND library required for ns_inittab and
# res_mkquery symbols.
# BIND_LIBRARY The BIND library (if any) required for
# ns_inittab and res_mkquery symbols
find_path(BIND_ROOT_DIR
NAMES include/resolv.h
@ -28,17 +27,29 @@ find_path(BIND_INCLUDE_DIR
HINTS ${BIND_ROOT_DIR}/include
)
find_library(BIND_LIBRARIES
NAMES resolv bind
HINTS ${BIND_ROOT_DIR}/lib
)
if (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
# the static resolv library is preferred because
# on some systems, the ns_initparse symbol is not
# exported in the shared library (strangely)
# see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=291609
set(bind_libs none libresolv.a resolv bind)
else ()
set(bind_libs none resolv bind)
endif ()
include(CheckCSourceCompiles)
# Find which library has the res_mkquery and ns_initparse symbols
set(CMAKE_REQUIRED_INCLUDES ${BIND_INCLUDE_DIR})
foreach (bindlib ${BIND_LIBRARIES})
set(CMAKE_REQUIRED_LIBRARIES ${bindlib})
foreach (bindlib ${bind_libs})
if (NOT ${bindlib} MATCHES "none")
find_library(BIND_LIBRARY
NAMES ${bindlib}
HINTS ${BIND_ROOT_DIR}/lib
)
endif ()
set(CMAKE_REQUIRED_LIBRARIES ${BIND_LIBRARY})
check_c_source_compiles("
#include <arpa/nameser.h>
@ -46,7 +57,7 @@ foreach (bindlib ${BIND_LIBRARIES})
ns_initparse(0, 0, 0);
return 0;
}
" ns_initparse_works)
" ns_initparse_works_${bindlib})
check_c_source_compiles("
#include <sys/types.h>
@ -57,26 +68,34 @@ foreach (bindlib ${BIND_LIBRARIES})
int main() {
int (*p)() = res_mkquery;
}
" res_mkquery_works)
" res_mkquery_works_${bindlib})
unset(CMAKE_REQUIRED_LIBRARIES)
if (ns_initparse_works AND res_mkquery_works)
set(BIND_LIBRARY ${bindlib})
if (ns_initparse_works_${bindlib} AND res_mkquery_works_${bindlib})
break ()
else ()
set(BIND_LIBRARY BIND_LIBRARY-NOTFOUND)
endif ()
endforeach ()
unset(CMAKE_REQUIRED_INCLUDES)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(BIND DEFAULT_MSG
BIND_LIBRARY
BIND_INCLUDE_DIR
)
if (ns_initparse_works_none AND res_mkquery_works_none)
# system does not require linking to a BIND library
find_package_handle_standard_args(BIND DEFAULT_MSG
BIND_INCLUDE_DIR
)
else ()
find_package_handle_standard_args(BIND DEFAULT_MSG
BIND_LIBRARY
BIND_INCLUDE_DIR
)
endif ()
mark_as_advanced(
BIND_ROOT_DIR
BIND_LIBRARIES
BIND_LIBRARY
BIND_INCLUDE_DIR
)