From 5ad4b1f3da7ea1c104e181b4787d2d9414a91f56 Mon Sep 17 00:00:00 2001
From: f4exb <f4exb06@gmail.com>
Date: Sat, 24 Nov 2018 18:47:56 +0100
Subject: [PATCH] SoapySDR support: Debian build fixes (1)

---
 libsoapysdr/CMakeLists.txt | 72 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/libsoapysdr/CMakeLists.txt b/libsoapysdr/CMakeLists.txt
index f2a2986d1..fd41345e7 100644
--- a/libsoapysdr/CMakeLists.txt
+++ b/libsoapysdr/CMakeLists.txt
@@ -1,5 +1,77 @@
 project(soapysdr)
 
+########################################################################
+# gather version information
+# packagers may specify -DSOAPY_SDR_EXTVER="foo" to replace the git hash
+########################################################################
+file(READ "${LIBSOAPYSDRSRC}/Changelog.txt" changelog_txt)
+string(REGEX MATCH "Release ([0-9]+\\.[0-9]+\\.[0-9]+) \\(" CHANGELOG_MATCH "${changelog_txt}")
+if(NOT CHANGELOG_MATCH)
+    message(FATAL_ERROR "Failed to extract version number from Changelog.txt")
+endif(NOT CHANGELOG_MATCH)
+set(SOAPY_SDR_LIBVER "${CMAKE_MATCH_1}")
+
+if (NOT SOAPY_SDR_EXTVER)
+    include(${LIBSOAPYSDRSRC}/cmake/Modules/GetGitRevisionDescription.cmake)
+    get_git_head_revision(GITREFSPEC GITHASH)
+    if (GITHASH)
+        string(SUBSTRING "${GITHASH}" 0 8 GITHASH)
+        set(SOAPY_SDR_EXTVER "g${GITHASH}")
+    else (GITHASH)
+        set(SOAPY_SDR_EXTVER "unknown")
+    endif (GITHASH)
+endif()
+
+set(SOAPY_SDR_VERSION "${SOAPY_SDR_LIBVER}-${SOAPY_SDR_EXTVER}")
+
+#SOAPY_SDR_ROOT is compiled into the library to locate the install base.
+#By default, the SOAPY_SDR_ROOT is set to the CMAKE_INSTALL_PREFIX.
+#However users may overload this by specifying -DSOAPY_SDR_ROOT=<path>.
+set(SOAPY_SDR_ROOT "${CMAKE_INSTALL_PREFIX}" CACHE PATH
+    "Installation root for SoapySDR::getRootPath()")
+file(TO_CMAKE_PATH "${SOAPY_SDR_ROOT}" SOAPY_SDR_ROOT)
+
+#SOAPY_SDR_ROOT_ENV is the name of the environment variable
+#which tells SoapySDR where to find the root installation.
+#By default, the environment variable SOAPY_SDR_ROOT is used.
+#Example: set -DSOAPY_SDR_ROOT_ENV=SNAP for snappy packages.
+set(SOAPY_SDR_ROOT_ENV "SOAPY_SDR_ROOT" CACHE STRING
+    "Environment variable for SoapySDR::getRootPath()")
+
+########################################################################
+# select the release build type by default to get optimization flags
+########################################################################
+if(NOT CMAKE_BUILD_TYPE)
+   set(CMAKE_BUILD_TYPE "Release")
+   message(STATUS "Build type not specified: defaulting to release.")
+endif(NOT CMAKE_BUILD_TYPE)
+set(CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE} CACHE STRING "")
+
+########################################################################
+# rpath setup - http://www.cmake.org/Wiki/CMake_RPATH_handling
+########################################################################
+# use, i.e. don't skip the full RPATH for the build tree
+option(CMAKE_SKIP_BUILD_RPATH "skip rpath build" FALSE)
+
+# when building, don't use the install RPATH already
+# (but later on when installing)
+option(CMAKE_BUILD_WITH_INSTALL_RPATH "build with install rpath" FALSE)
+
+# the RPATH to be used when installing, but only if it's not a system directory
+option(CMAKE_AUTOSET_INSTALL_RPATH TRUE)
+if(CMAKE_AUTOSET_INSTALL_RPATH)
+LIST(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}" isSystemDir)
+IF("${isSystemDir}" STREQUAL "-1")
+    SET(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}")
+ENDIF("${isSystemDir}" STREQUAL "-1")
+endif(CMAKE_AUTOSET_INSTALL_RPATH)
+
+# add the automatically determined parts of the RPATH
+# which point to directories outside the build tree to the install RPATH
+option(CMAKE_INSTALL_RPATH_USE_LINK_PATH "build with automatic rpath" TRUE)
+
+########################################################################
+
 file(GLOB soapysdr_SOURCES
 	${LIBSOAPYSDRSRC}/lib/*.cpp
 )