WL#5161 : Cross-platform build with CMake

1 files changed, 64 insertions, 0 deletions

diff --git a/cmake/bison.cmake b/cmake/bison.cmake
new file mode 100644
index 00000000000..b1c2d7393fa
--- /dev/null
+++ b/cmake/bison.cmake
@@ -0,0 +1,64 @@
+# Copyright (C) 2009 Sun Microsystems, Inc
+# 
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA 
+
+FIND_PROGRAM(BISON_EXECUTABLE bison DOC "path to the bison executable")
+MARK_AS_ADVANCED(BISON_EXECUTABLE "")
+IF(NOT BISON_EXECUTABLE)
+  MESSAGE("Warning: Bison executable not found in PATH")
+ELSEIF(BISON_EXECUTABLE AND NOT BISON_USABLE)
+  # Check version as well
+  EXEC_PROGRAM(${BISON_EXECUTABLE} ARGS --version OUTPUT_VARIABLE BISON_VERSION_STR)
+   # Get first line in case it's multiline
+   STRING(REGEX REPLACE "([^\n]+).*" "\\1" FIRST_LINE "${BISON_VERSION_STR}")
+   # get version information
+   STRING(REGEX REPLACE ".* ([0-9]+)\\.([0-9]+)" "\\1" BISON_VERSION_MAJOR "${FIRST_LINE}")
+   STRING(REGEX REPLACE ".* ([0-9]+)\\.([0-9]+)" "\\2" BISON_VERSION_MINOR "${FIRST_LINE}")
+   IF (BISON_VERSION_MAJOR LESS 2)
+     MESSAGE("Warning: bison version is old. please update to version 2")
+   ELSE()
+     SET(BISON_USABLE 1 CACHE INTERNAL "Bison version 2 or higher")
+   ENDIF()
+ENDIF()
+
+# Use bison to generate C++ and header file
+MACRO (RUN_BISON input_yy output_cc output_h)
+  IF(BISON_TOO_OLD)
+    IF(EXISTS ${output_cc} AND EXISTS ${output_h})
+      SET(BISON_USABLE FALSE)
+  ENDIF()
+  ENDIF()
+  IF(BISON_USABLE)
+    ADD_CUSTOM_COMMAND(
+      OUTPUT ${output_cc}
+             ${output_h}
+      COMMAND bison  -y -p MYSQL 
+       --output=${output_cc}
+       --defines=${output_h}
+        ${input_yy}
+        DEPENDS ${input_yy}
+	)
+  ELSE()
+    # Bison is missing or not usable, e.g too old
+    IF(EXISTS  ${output_cc} AND EXISTS ${output_h})
+      IF(${input_yy} IS_NEWER_THAN ${output_cc}  OR  ${input_yy} IS_NEWER_THAN ${output_h})
+        # Possibly timestamps are messed up in source distribution.
+        MESSAGE("Warning: no usable bison found, ${input_yy} will not be rebuilt.")
+      ENDIF()
+    ELSE()
+      # Output files are missing, bail out.
+      MESSAGE(FATAL_ERROR "Please install bison.")
+    ENDIF()
+  ENDIF()
+ENDMACRO()