11 files changed, 68 insertions, 30 deletions
diff --git a/cmake/check_reqs.cmake b/cmake/check_reqs.cmake
new file mode 100644
index 0000000..ad12ca7
--- /dev/null
+++ b/cmake/check_reqs.cmake
@@ -0,0 +1,12 @@
+set(HAVE_LIBSODIUM FALSE)
+
+get_property(nacl_required GLOBAL PROPERTY NACL_REQUIRED)
+if(${nacl_required})
+  if("${NACL_LIBRARIES}" STREQUAL "")
+    message(FATAL_ERROR "NaCl is not available, but a selected module needs it")
+  endif()
+
+  if(USE_LIBSODIUM)
+    set(HAVE_LIBSODIUM TRUE)
+  endif(USE_LIBSODIUM)
+endif(${nacl_required})
diff --git a/cmake/deps.cmake b/cmake/deps.cmake
index fa3cb03..c3936af 100644
--- a/cmake/deps.cmake
+++ b/cmake/deps.cmake
@@ -17,24 +17,30 @@ set(NACL_LIBRARIES "")
 set(NACL_LDFLAGS_OTHER "")
 
 if(USE_LIBSODIUM)
-  pkg_check_modules(SODIUM REQUIRED libsodium)
-
-  set(NACL_INCLUDE_DIRS "${SODIUM_INCLUDE_DIRS}")
-  foreach(dir "${SODIUM_INCLUDEDIR}" ${SODIUM_INCLUDE_DIRS})
-    list(APPEND NACL_INCLUDE_DIRS "${dir}/sodium")
-  endforeach(dir)
-
-  set(NACL_CFLAGS_OTHER "${SODIUM_CFLAGS_OTHER}")
-  set(NACL_LIBRARY_DIRS "${SODIUM_LIBRARY_DIRS}")
-  set(NACL_LIBRARIES "${SODIUM_LIBRARIES}")
-  set(NACL_LDFLAGS_OTHER "${SODIUM_LDFLAGS_OTHER}")
+  pkg_check_modules(SODIUM libsodium)
+
+  if(SODIUM_FOUND)
+    set(NACL_INCLUDE_DIRS "${SODIUM_INCLUDE_DIRS}")
+    foreach(dir "${SODIUM_INCLUDEDIR}" ${SODIUM_INCLUDE_DIRS})
+      list(APPEND NACL_INCLUDE_DIRS "${dir}/sodium")
+    endforeach(dir)
+
+    set(NACL_CFLAGS_OTHER "${SODIUM_CFLAGS_OTHER}")
+    set(NACL_LIBRARY_DIRS "${SODIUM_LIBRARY_DIRS}")
+    set(NACL_LIBRARIES "${SODIUM_LIBRARIES}")
+    set(NACL_LDFLAGS_OTHER "${SODIUM_LDFLAGS_OTHER}")
+  endif(SODIUM_FOUND)
 else(USE_LIBSODIUM)
-  find_package(NaCl REQUIRED)
+  find_package(NaCl)
 
-  set(NACL_INCLUDE_DIRS "${NACL_INCLUDE_DIR}")
-  set(NACL_LIBRARIES "${NACL_LIBRARY}")
+  if(NACL_FOUND)
+    set(NACL_INCLUDE_DIRS "${NACL_INCLUDE_DIR}")
+    set(NACL_LIBRARIES "${NACL_LIBRARY}")
+  endif(NACL_FOUND)
 endif(USE_LIBSODIUM)
 
+set_property(GLOBAL PROPERTY NACL_REQUIRED FALSE)
+
 
 if(WITH_CAPABILITIES)
   find_package(CAP REQUIRED)
diff --git a/cmake/fastd_module.cmake b/cmake/fastd_module.cmake
index d18719a..d1b6d3b 100644
--- a/cmake/fastd_module.cmake
+++ b/cmake/fastd_module.cmake
@@ -1,9 +1,13 @@
-function(fastd_module type enabled_var info name)
+macro(_fastd_module_handle_name)
   string(TOUPPER "${type}" TYPE)
 
   string(REPLACE - _ name_ "${name}")
   string(REPLACE " " _ name_ "${name_}")
   string(TOUPPER "${name_}" NAME)
+endmacro(_fastd_module_handle_name)
+
+function(fastd_module type enabled_var info name)
+  _fastd_module_handle_name()
 
   set(WITH_${TYPE}_${NAME} TRUE CACHE BOOL "Include the ${name} ${info}")
 
@@ -21,11 +25,7 @@ function(fastd_module type enabled_var info name)
 endfunction(fastd_module)
 
 function(fastd_module_include_directories type name)
-  string(TOUPPER "${type}" TYPE)
-
-  string(REPLACE - _ name_ "${name}")
-  string(REPLACE " " _ name_ "${name_}")
-  string(TOUPPER "${name_}" NAME)
+  _fastd_module_handle_name()
 
   if(WITH_${TYPE}_${NAME})
     target_include_directories(${type}_${name_} PRIVATE ${ARGN})
@@ -33,13 +33,19 @@ function(fastd_module_include_directories type name)
 endfunction(fastd_module_include_directories)
 
 function(fastd_module_link_libraries type name)
-  string(TOUPPER "${type}" TYPE)
-
-  string(REPLACE - _ name_ "${name}")
-  string(REPLACE " " _ name_ "${name_}")
-  string(TOUPPER "${name_}" NAME)
+  _fastd_module_handle_name()
 
   if(WITH_${TYPE}_${NAME})
     target_link_libraries(${type}_${name_} ${ARGN})
   endif(WITH_${TYPE}_${NAME})
 endfunction(fastd_module_link_libraries)
+
+function(fastd_module_require type name)
+  _fastd_module_handle_name()
+
+  if(WITH_${TYPE}_${NAME})
+    foreach(req ${ARGN})
+      set_property(GLOBAL PROPERTY ${req}_REQUIRED TRUE)
+    endforeach(req)
+  endif(WITH_${TYPE}_${NAME})
+endfunction(fastd_module_require)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 361b546..6c882b7 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -6,14 +6,14 @@ link_directories(${UECC_LIBRARY_DIRS} ${NACL_LIBRARY_DIRS})
 
 
 include(generate_version)
-configure_file(${CMAKE_CURRENT_SOURCE_DIR}/fastd_config.h.in ${CMAKE_CURRENT_BINARY_DIR}/fastd_config.h)
-
 
 include(fastd_module)
 add_subdirectory(protocols)
 add_subdirectory(methods)
 add_subdirectory(crypto)
 
+include(check_reqs)
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/fastd_config.h.in ${CMAKE_CURRENT_BINARY_DIR}/fastd_config.h)
 
 BISON_TARGET(fastd_config_parse config.y ${CMAKE_CURRENT_BINARY_DIR}/config.yy.c)
 
diff --git a/src/crypto/cipher/CMakeLists.txt b/src/crypto/cipher/CMakeLists.txt
index 3d70c70..addb28c 100644
--- a/src/crypto/cipher/CMakeLists.txt
+++ b/src/crypto/cipher/CMakeLists.txt
@@ -31,6 +31,10 @@ macro(fastd_cipher_impl_link_libraries cipher name)
   fastd_module_link_libraries(cipher "${cipher} ${name}" ${ARGN})
 endmacro(fastd_cipher_impl_link_libraries)
 
+macro(fastd_cipher_impl_require cipher name)
+  fastd_module_require(cipher "${cipher} ${name}" ${ARGN})
+endmacro(fastd_cipher_impl_require)
+
 
 add_subdirectory(aes128_ctr)
 
diff --git a/src/crypto/cipher/aes128_ctr/nacl/CMakeLists.txt b/src/crypto/cipher/aes128_ctr/nacl/CMakeLists.txt
index 50e2283..676aa5d 100644
--- a/src/crypto/cipher/aes128_ctr/nacl/CMakeLists.txt
+++ b/src/crypto/cipher/aes128_ctr/nacl/CMakeLists.txt
@@ -3,3 +3,4 @@ fastd_cipher_impl(aes128-ctr nacl
 )
 fastd_cipher_impl_include_directories(aes128-ctr nacl ${NACL_INCLUDE_DIRS})
 fastd_cipher_impl_link_libraries(aes128-ctr nacl ${NACL_LIBRARIES})
+fastd_cipher_impl_require(aes128-ctr nacl NACL)
diff --git a/src/crypto/mac/CMakeLists.txt b/src/crypto/mac/CMakeLists.txt
index 8c80ee1..fe13ace 100644
--- a/src/crypto/mac/CMakeLists.txt
+++ b/src/crypto/mac/CMakeLists.txt
@@ -31,6 +31,10 @@ macro(fastd_mac_impl_link_libraries mac name)
   fastd_module_link_libraries(mac "${mac} ${name}" ${ARGN})
 endmacro(fastd_mac_impl_link_libraries)
 
+macro(fastd_mac_impl_require mac name)
+  fastd_module_require(mac "${mac} ${name}" ${ARGN})
+endmacro(fastd_mac_impl_require)
+
 
 add_subdirectory(ghash)
 
diff --git a/src/fastd.c b/src/fastd.c
index 6c2b9e5..f30511d 100644
--- a/src/fastd.c
+++ b/src/fastd.c
@@ -39,7 +39,7 @@
 #include <syslog.h>
 #include <sys/resource.h>
 
-#ifdef USE_LIBSODIUM
+#ifdef HAVE_LIBSODIUM
 #include <sodium/core.h>
 #endif
 
@@ -739,7 +739,7 @@ static void drop_caps(fastd_context_t *ctx) {
 }
 
 int main(int argc, char *argv[]) {
-#ifdef USE_LIBSODIUM
+#ifdef HAVE_LIBSODIUM
 	sodium_init();
 #endif
 
diff --git a/src/fastd_config.h.in b/src/fastd_config.h.in
index dd54033..8ef3aa0 100644
--- a/src/fastd_config.h.in
+++ b/src/fastd_config.h.in
@@ -45,7 +45,7 @@
 #cmakedefine WITH_CMDLINE_COMMANDS
 
 
-#cmakedefine USE_LIBSODIUM
+#cmakedefine HAVE_LIBSODIUM
 
 #define MAX_CONFIG_DEPTH @MAX_CONFIG_DEPTH_NUM@
 
diff --git a/src/methods/CMakeLists.txt b/src/methods/CMakeLists.txt
index f67ea0c..3d1e2e2 100644
--- a/src/methods/CMakeLists.txt
+++ b/src/methods/CMakeLists.txt
@@ -17,6 +17,10 @@ macro(fastd_method_link_libraries)
   fastd_module_link_libraries(method ${ARGN})
 endmacro(fastd_method_link_libraries)
 
+macro(fastd_method_require)
+  fastd_module_require(method ${ARGN})
+endmacro(fastd_method_require)
+
 
 add_subdirectory(null)
 add_subdirectory(generic_gcm)
diff --git a/src/methods/xsalsa20_poly1305/CMakeLists.txt b/src/methods/xsalsa20_poly1305/CMakeLists.txt
index d071d99..97dee39 100644
--- a/src/methods/xsalsa20_poly1305/CMakeLists.txt
+++ b/src/methods/xsalsa20_poly1305/CMakeLists.txt
@@ -3,3 +3,4 @@ fastd_method(xsalsa20-poly1305
 )
 fastd_method_include_directories(xsalsa20-poly1305 ${NACL_INCLUDE_DIRS})
 fastd_method_link_libraries(xsalsa20-poly1305 method_common ${NACL_LIBRARIES})
+fastd_method_require(xsalsa20-poly1305 NACL)