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.

9 files changed, 57 insertions, 27 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 570e0ef..bfd1363 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,12 +26,18 @@ string(STRIP ${TLS_VERSION} TLS_VERSION)
 string(REPLACE ":" "." TLS_VERSION ${TLS_VERSION})
 string(REGEX REPLACE "\\..*" "" TLS_MAJOR_VERSION ${TLS_VERSION})
 
+option(LIBRESSL_SKIP_INSTALL "Skip installation" ${LIBRESSL_SKIP_INSTALL})
 option(ENABLE_ASM "Enable assembly" ON)
 option(ENABLE_EXTRATESTS "Enable extra tests that may be unreliable on some platforms" OFF)
 option(ENABLE_NC "Enable installing TLS-enabled nc(1)" OFF)
 option(ENABLE_VSTEST "Enable test on Visual Studio" OFF)
 set(OPENSSLDIR ${OPENSSLDIR} CACHE PATH "Set the default openssl directory" FORCE)
 
+if(NOT LIBRESSL_SKIP_INSTALL)
+        set( ENABLE_LIBRESSL_INSTALL ON )
+endif(NOT LIBRESSL_SKIP_INSTALL)
+
+
 set(BUILD_NC true)
 
 if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
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()
diff --git a/apps/ocspcheck/CMakeLists.txt b/apps/ocspcheck/CMakeLists.txt
index a14485e..064c367 100644
--- a/apps/ocspcheck/CMakeLists.txt
+++ b/apps/ocspcheck/CMakeLists.txt
@@ -36,7 +36,9 @@ endif()
 add_executable(ocspcheck ${OCSPCHECK_SRC})
 target_link_libraries(ocspcheck tls ${OPENSSL_LIBS})
 
-install(TARGETS ocspcheck DESTINATION bin)
-install(FILES ocspcheck.8 DESTINATION share/man/man8)
+if(ENABLE_LIBRESSL_INSTALL)
+        install(TARGETS ocspcheck DESTINATION bin)
+        install(FILES ocspcheck.8 DESTINATION share/man/man8)
+endif(ENABLE_LIBRESSL_INSTALL)
 
 endif()
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 ${CONF_DIR}/cert)
+endif(ENABLE_LIBRESSL_INSTALL)
diff --git a/crypto/CMakeLists.txt b/crypto/CMakeLists.txt
index f8c5684..a2b4817 100644
--- a/crypto/CMakeLists.txt
+++ b/crypto/CMakeLists.txt
@@ -829,9 +829,13 @@ if (BUILD_SHARED)
                 ARCHIVE_OUTPUT_NAME crypto${CRYPTO_POSTFIX})
         set_target_properties(crypto-shared PROPERTIES VERSION
                 ${CRYPTO_VERSION} SOVERSION ${CRYPTO_MAJOR_VERSION})
-        install(TARGETS crypto crypto-shared DESTINATION lib)
+        if(ENABLE_LIBRESSL_INSTALL)
+                install(TARGETS crypto crypto-shared DESTINATION lib)
+        endif(ENABLE_LIBRESSL_INSTALL)
 else()
         add_library(crypto STATIC ${CRYPTO_SRC})
-        install(TARGETS crypto DESTINATION lib)
+        if(ENABLE_LIBRESSL_INSTALL)
+                install(TARGETS crypto DESTINATION lib)
+        endif(ENABLE_LIBRESSL_INSTALL)
 endif()
 
diff --git a/include/CMakeLists.txt b/include/CMakeLists.txt
index 110caa5..870c740 100644
--- a/include/CMakeLists.txt
+++ b/include/CMakeLists.txt
@@ -1,5 +1,7 @@
-install(DIRECTORY .
-        DESTINATION include
-        PATTERN "CMakeLists.txt" EXCLUDE
-        PATTERN "compat" EXCLUDE
-        PATTERN "Makefile*" EXCLUDE)
+if(ENABLE_LIBRESSL_INSTALL)
+        install(DIRECTORY .
+                DESTINATION include
+                PATTERN "CMakeLists.txt" EXCLUDE
+                PATTERN "compat" EXCLUDE
+                PATTERN "Makefile*" EXCLUDE)
+endif(ENABLE_LIBRESSL_INSTALL)
diff --git a/man/CMakeLists.txt b/man/CMakeLists.txt
index 5923f58..f08091c 100644
--- a/man/CMakeLists.txt
+++ b/man/CMakeLists.txt
@@ -1,9 +1,11 @@
-install(DIRECTORY .
-    DESTINATION share/man/man3
-    FILES_MATCHING PATTERN "*.3"
-    )
+if(ENABLE_LIBRESSL_INSTALL)
+        install(DIRECTORY .
+            DESTINATION share/man/man3
+            FILES_MATCHING PATTERN "*.3"
+            )
 
-install(DIRECTORY .
-    DESTINATION share/man/man1
-    FILES_MATCHING PATTERN "*.1"
-    )
+        install(DIRECTORY .
+            DESTINATION share/man/man1
+            FILES_MATCHING PATTERN "*.1"
+            )
+endif(ENABLE_LIBRESSL_INSTALL)
diff --git a/ssl/CMakeLists.txt b/ssl/CMakeLists.txt
index bc2fea4..0e1c326 100644
--- a/ssl/CMakeLists.txt
+++ b/ssl/CMakeLists.txt
@@ -60,8 +60,12 @@ if (BUILD_SHARED)
                 ARCHIVE_OUTPUT_NAME ssl${SSL_POSTFIX})
         set_target_properties(ssl-shared PROPERTIES VERSION ${SSL_VERSION}
                 SOVERSION ${SSL_MAJOR_VERSION})
-        install(TARGETS ssl ssl-shared DESTINATION lib)
+        if(ENABLE_LIBRESSL_INSTALL)
+                install(TARGETS ssl ssl-shared DESTINATION lib)
+        endif(ENABLE_LIBRESSL_INSTALL)
 else()
         add_library(ssl STATIC ${SSL_SRC})
-        install(TARGETS ssl DESTINATION lib)
+        if(ENABLE_LIBRESSL_INSTALL)
+                install(TARGETS ssl DESTINATION lib)
+        endif(ENABLE_LIBRESSL_INSTALL)
 endif()
diff --git a/tls/CMakeLists.txt b/tls/CMakeLists.txt
index b71fb37..ab73460 100644
--- a/tls/CMakeLists.txt
+++ b/tls/CMakeLists.txt
@@ -39,9 +39,13 @@ if (BUILD_SHARED)
                 ARCHIVE_OUTPUT_NAME tls${TLS_POSTFIX})
         set_target_properties(tls-shared PROPERTIES VERSION ${TLS_VERSION}
                 SOVERSION ${TLS_MAJOR_VERSION})
-        install(TARGETS tls tls-shared DESTINATION lib)
+        if(ENABLE_LIBRESSL_INSTALL)
+                install(TARGETS tls tls-shared DESTINATION lib)
+        endif(ENABLE_LIBRESSL_INSTALL)
 else()
         add_library(tls STATIC ${TLS_SRC})
-        install(TARGETS tls DESTINATION lib)
+        if(ENABLE_LIBRESSL_INSTALL)
+                install(TARGETS tls DESTINATION lib)
+        endif(ENABLE_LIBRESSL_INSTALL)
 endif()