[LyX/master] Cmake build: Output error messages emitted by lyx_pot.py

[Kornel Benko]

commit 337ec5830a041ec1f6a149bf1a93f59da766e930
Author: Kornel Benko <kor...@lyx.org>
Date:   Sun Apr 22 12:06:47 2018 +0200

    Cmake build: Output error messages emitted by lyx_pot.py
---
 po/CreateLayoutTranslations.cmake |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/po/CreateLayoutTranslations.cmake 
b/po/CreateLayoutTranslations.cmake
index 1987f41..1eff48a 100644
--- a/po/CreateLayoutTranslations.cmake
+++ b/po/CreateLayoutTranslations.cmake
@@ -34,7 +34,11 @@ die_if(_err "Copy of layouttranslations failed")
 execute_process(COMMAND ${LYX_PYTHON_EXECUTABLE}
   "${TOP_SRC_DIR}/po/lyx_pot.py" -b "${TOP_SRC_DIR}" -o "${_dst}" -t ${type}
   "--src_file=${_src_files}"
+  OUTPUT_VARIABLE _err_out
   RESULT_VARIABLE _err)
+if(_err)
+  message(STATUS "${_err_out}")
+endif()
 die_if(_err "Calling lyx_pot.py failed")
 
 execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different "${_dst}" 
"${TOP_SRC_DIR}/lib/layouttranslations"