From 933eca17b14cba099eb2f3ee8c31f369b99e6b39 Mon Sep 17 00:00:00 2001
From: Martin Braun <martin.braun@ettus.com>
Date: Fri, 6 Mar 2020 12:53:10 -0800
Subject: cmake: Add CMakeRC module and ::rc namespace

This module allows to add binary files into UHD (e.g., for cal data
storage) in a platform-independent way.

The upstream CMakeRC.cmake is modified in the following way to allow
linkage against a shared object:

```diff
     # Generate the actual static library. Each source file is just a single file
     # with a character array compiled in containing the contents of the
     # corresponding resource file.
     add_library(${name} STATIC ${libcpp})
     set_property(TARGET ${name} PROPERTY CMRC_LIBDIR "${libdir}")
     set_property(TARGET ${name} PROPERTY CMRC_NAMESPACE "${ARG_NAMESPACE}")
     target_link_libraries(${name} PUBLIC cmrc::base)
     set_property(TARGET ${name} PROPERTY CMRC_IS_RESOURCE_LIBRARY TRUE)
+    set_property(TARGET ${name} PROPERTY POSITION_INDEPENDENT_CODE ON)
```

This forces the -fPIC flag for the static object that CMakeRC generates,
allowing to link it into a shared object file.

The version of CMakeRC used is: a7e355290, cloned from
git@github.com:vector-of-bool/cmrc.git.
---
 host/lib/CMakeLists.txt    |  7 ++++++-
 host/lib/rc/CMakeLists.txt | 11 +++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 host/lib/rc/CMakeLists.txt

(limited to 'host/lib')

diff --git a/host/lib/CMakeLists.txt b/host/lib/CMakeLists.txt
index 18bc47f54..4d747c9c7 100644
--- a/host/lib/CMakeLists.txt
+++ b/host/lib/CMakeLists.txt
@@ -130,6 +130,11 @@ if(ENABLE_C_API)
     )
 endif(ENABLE_C_API)
 
+########################################################################
+# Add common resource compiler subdirectory
+########################################################################
+add_subdirectory(rc)
+
 ########################################################################
 # Add DLL resource file to Windows build
 ########################################################################
@@ -172,7 +177,7 @@ if(ENABLE_MPMD)
     list(APPEND libuhd_sources $<TARGET_OBJECTS:uhd_rpclib>)
 endif()
 add_library(uhd SHARED ${libuhd_sources})
-target_link_libraries(uhd ${Boost_LIBRARIES} ${libuhd_libs})
+target_link_libraries(uhd ${Boost_LIBRARIES} ${libuhd_libs} uhd_rc)
 set_target_properties(uhd PROPERTIES DEFINE_SYMBOL "UHD_DLL_EXPORTS")
 if(NOT LIBUHDDEV_PKG)
     set_target_properties(uhd PROPERTIES SOVERSION "${UHD_ABI_VERSION}")
diff --git a/host/lib/rc/CMakeLists.txt b/host/lib/rc/CMakeLists.txt
new file mode 100644
index 000000000..1595e7e85
--- /dev/null
+++ b/host/lib/rc/CMakeLists.txt
@@ -0,0 +1,11 @@
+#
+# Copyright 2020 Ettus Research, a National Instruments Brand
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+
+include(CMakeRC)
+cmrc_add_resource_library(uhd-resources
+    ALIAS uhd_rc
+    NAMESPACE rc
+)
-- 
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