(#2): Generate a header file with the version number

Fixes https://gitlab.com/federicomenaquintero/bzip2/issues/2

CMakeLists.txt

@@ -16,6 +16,13 @@ set(LT_AGE      0)
 set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake" ${CMAKE_MODULE_PATH})
 include(Version)
 
+set(BZ_VERSION ${PROJECT_VERSION})
+configure_file (
+  "${PROJECT_SOURCE_DIR}/bz_version.h.in"
+  "${PROJECT_BINARY_DIR}/bz_version.h"
+)
+include_directories("${PROJECT_BINARY_DIR}")
+
 math(EXPR LT_SOVERSION "${LT_CURRENT} - ${LT_AGE}")
 set(LT_VERSION "${LT_SOVERSION}.${LT_AGE}.${LT_REVISION}")
 set(PACKAGE_VERSION "${PROJECT_VERSION}")

bz_version.h.in

@@ -0,0 +1 @@
+#define BZ_VERSION "@BZ_VERSION@"

bzlib.c

@@ -29,6 +29,7 @@
 */
 
 #include "bzlib_private.h"
+#include "bz_version.h"
 
 
 /*---------------------------------------------------*/

bzlib_private.h

@@ -36,8 +36,6 @@
 
 /*-- General stuff. --*/
 
-#define BZ_VERSION  "1.0.6, 6-Sept-2010"
-
 typedef char            Char;
 typedef unsigned char   Bool;
 typedef unsigned char   UChar;

meson.build

@@ -6,6 +6,14 @@ project(
   default_options : ['c_std=c89', 'warning_level=1'],
 )
 
+conf_data = configuration_data()
+conf_data.set('BZ_VERSION', meson.project_version())
+configure_file(
+  input: 'bz_version.h.in',
+  output: 'bz_version.h',
+  configuration: conf_data
+)
+
 cc = meson.get_compiler('c')
 add_project_arguments(cc.get_supported_arguments([
     '-Winline',