Add option LIBRESSL_SKIP_INSTALL

Internally LIBRESSL_SKIP_INSTALL, if not set becomes ENABLE_LIBRESSL_INSTALL so this by default is enabled.  defining LIBRESSL_SKIP_INSTALL before hand will disable all install() rules.
This is useful if another project includes and links to this statically.
I chose to add a prefix to avoid potential name collision because the options are cached globally.

If the installation is skipped, maybe it should also disable building apps?  I didn't do that.

1 files changed, 4 insertions, 2 deletions

diff --git a/apps/nc/CMakeLists.txt b/apps/nc/CMakeLists.txt
index c8757a6..424c676 100644
--- a/apps/nc/CMakeLists.txt
+++ b/apps/nc/CMakeLists.txt
@@ -53,8 +53,10 @@ add_executable(nc ${NC_SRC})
 target_link_libraries(nc tls ${OPENSSL_LIBS})
 
 if(ENABLE_NC)
-        install(TARGETS nc DESTINATION bin)
-        install(FILES nc.1 DESTINATION share/man/man1)
+        if(ENABLE_LIBRESSL_INSTALL)
+                install(TARGETS nc DESTINATION bin)
+                install(FILES nc.1 DESTINATION share/man/man1)
+        endif(ENABLE_LIBRESSL_INSTALL)
 endif()
 
 endif()