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, 8 insertions, 4 deletions

diff --git a/apps/openssl/CMakeLists.txt b/apps/openssl/CMakeLists.txt
index 9512065..cf5c852 100644
--- a/apps/openssl/CMakeLists.txt
+++ b/apps/openssl/CMakeLists.txt
@@ -76,13 +76,17 @@ endif()
 add_executable(openssl ${OPENSSL_SRC})
 target_link_libraries(openssl ${OPENSSL_LIBS})
 
-install(TARGETS openssl DESTINATION bin)
-install(FILES openssl.1 DESTINATION share/man/man1)
+if(ENABLE_LIBRESSL_INSTALL)
+        install(TARGETS openssl DESTINATION bin)
+        install(FILES openssl.1 DESTINATION share/man/man1)
+endif(ENABLE_LIBRESSL_INSTALL)
 
 if(NOT "${OPENSSLDIR}" STREQUAL "")
         set(CONF_DIR "${OPENSSLDIR}")
 else()
         set(CONF_DIR "${CMAKE_INSTALL_PREFIX}/etc/ssl")
 endif()
-install(FILES cert.pem openssl.cnf x509v3.cnf DESTINATION ${CONF_DIR})
-install(DIRECTORY DESTINATION ${CONF_DIR}/cert)
+if(ENABLE_LIBRESSL_INSTALL)
+        install(FILES cert.pem openssl.cnf x509v3.cnf DESTINATION ${CONF_DIR})
+        install(DIRECTORY DESTINATION ${CONF_DIR}/cert)
+endif(ENABLE_LIBRESSL_INSTALL)