Fix iOS combined feature for single architecture targets

If list of valid target architectures is empty for given SDK then there will
be no VALID_ARCHS build setting returned by Xcode. Return "" (empty string)
explicitly in this case. This may happens if CMAKE_IOS_INSTALL_COMBINED is ON
but only one architecture used in target.

1 files changed, 25 insertions, 0 deletions

diff --git a/Tests/RunCMake/XcodeProject/XcodeIOSInstallCombinedSingleArch-install-check.cmake b/Tests/RunCMake/XcodeProject/XcodeIOSInstallCombinedSingleArch-install-check.cmake
new file mode 100644
index 0000000..3c11ae0
--- /dev/null
+++ b/Tests/RunCMake/XcodeProject/XcodeIOSInstallCombinedSingleArch-install-check.cmake
@@ -0,0 +1,25 @@
+function(verify_architecture file)
+  execute_process(
+    COMMAND xcrun lipo -info ${RunCMake_TEST_BINARY_DIR}/_install/${file}
+    OUTPUT_VARIABLE lipo_out
+    ERROR_VARIABLE lipo_err
+    RESULT_VARIABLE lipo_result)
+  if(NOT lipo_result EQUAL "0")
+    message(SEND_ERROR "lipo -info failed: ${lipo_err}")
+    return()
+  endif()
+
+  string(REGEX MATCHALL "is architecture: [^ \n\t]+" architecture "${lipo_out}")
+  string(REGEX REPLACE "is architecture: " "" actual "${architecture}")
+
+  set(expected armv7)
+
+  if(NOT actual STREQUAL expected)
+    message(SEND_ERROR
+      "The actual library architecture:\n ${actual} \n"
+      "which do not match expected ones:\n ${expected} \n"
+      "lipo output:\n${lipo_out}")
+  endif()
+endfunction()
+
+verify_architecture(lib/libfoo.dylib)