extensions: avoid useless duplication of headers

The export header is identical between the main library and the
extensions. It is generated from the same template, the libraries share
the same properties, and the only difference is that they use different
symbol names. Let them share a header.

extensions/CMakeLists.txt

@@ -18,8 +18,6 @@ include_directories(
   ${PROJECT_BINARY_DIR}/src
 )
 
-include (GenerateExportHeader)
-
 include_directories(. ${CMAKE_CURRENT_BINARY_DIR})
 
 set(CMAKE_C_FLAGS_PROFILE "${CMAKE_C_FLAGS_RELEASE} -pg")
@@ -30,6 +28,7 @@ if (CMARK_SHARED)
 
   set_target_properties(${LIBRARY} PROPERTIES
     OUTPUT_NAME "cmark-gfm-extensions"
+    DEFINE_SYMBOL "cmark-gfm"
     SOVERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}.gfm.${PROJECT_VERSION_GFM}
     VERSION ${PROJECT_VERSION})
 
@@ -39,9 +38,6 @@ if (CMARK_SHARED)
   # Avoid name clash between PROGRAM and LIBRARY pdb files.
   set_target_properties(${LIBRARY} PROPERTIES PDB_NAME cmark-gfm-extensions_dll)
 
-  generate_export_header(${LIBRARY}
-    BASE_NAME cmark-gfm-extensions)
-
   list(APPEND CMARK_INSTALL ${LIBRARY})
   target_link_libraries(${LIBRARY} libcmark-gfm)
 
@@ -52,6 +48,7 @@ if (CMARK_STATIC)
 
   set_target_properties(${STATICLIBRARY} PROPERTIES
     COMPILE_FLAGS "-DCMARK_GFM_STATIC_DEFINE -DCMARK_GFM_EXTENSIONS_STATIC_DEFINE"
+    DEFINE_SYMBOL "cmark-gfm"
     POSITION_INDEPENDENT_CODE ON)
 
   if (MSVC)
@@ -64,11 +61,6 @@ if (CMARK_STATIC)
       VERSION ${PROJECT_VERSION})
   endif(MSVC)
 
-  if (NOT CMARK_SHARED)
-    generate_export_header(${STATICLIBRARY}
-      BASE_NAME cmark-gfm-extensions)
-  endif()
-
   list(APPEND CMARK_INSTALL ${STATICLIBRARY})
 endif()
 
@@ -85,7 +77,6 @@ install(TARGETS ${CMARK_INSTALL}
 if (CMARK_SHARED OR CMARK_STATIC)
   install(FILES
   cmark-gfm-core-extensions.h
-  ${CMAKE_CURRENT_BINARY_DIR}/cmark-gfm-extensions_export.h
   DESTINATION include
   )
 

extensions/cmark-gfm-core-extensions.h

@@ -6,45 +6,45 @@ extern "C" {
 #endif
 
 #include "cmark-gfm-extension_api.h"
-#include "cmark-gfm-extensions_export.h"
+#include "cmark-gfm_export.h"
 #include "config.h" // for bool
 #include <stdint.h>
 
-CMARK_GFM_EXTENSIONS_EXPORT
+CMARK_GFM_EXPORT
 void cmark_gfm_core_extensions_ensure_registered(void);
 
-CMARK_GFM_EXTENSIONS_EXPORT
+CMARK_GFM_EXPORT
 uint16_t cmark_gfm_extensions_get_table_columns(cmark_node *node);
 
 /** Sets the number of columns for the table, returning 1 on success and 0 on error.
  */
-CMARK_GFM_EXTENSIONS_EXPORT
+CMARK_GFM_EXPORT
 int cmark_gfm_extensions_set_table_columns(cmark_node *node, uint16_t n_columns);
 
-CMARK_GFM_EXTENSIONS_EXPORT
+CMARK_GFM_EXPORT
 uint8_t *cmark_gfm_extensions_get_table_alignments(cmark_node *node);
 
 /** Sets the alignments for the table, returning 1 on success and 0 on error.
  */
-CMARK_GFM_EXTENSIONS_EXPORT
+CMARK_GFM_EXPORT
 int cmark_gfm_extensions_set_table_alignments(cmark_node *node, uint16_t ncols, uint8_t *alignments);
 
-CMARK_GFM_EXTENSIONS_EXPORT
+CMARK_GFM_EXPORT
 int cmark_gfm_extensions_get_table_row_is_header(cmark_node *node);
 
 /** Sets whether the node is a table header row, returning 1 on success and 0 on error.
  */
-CMARK_GFM_EXTENSIONS_EXPORT
+CMARK_GFM_EXPORT
 int cmark_gfm_extensions_set_table_row_is_header(cmark_node *node, int is_header);
 
-CMARK_GFM_EXTENSIONS_EXPORT
+CMARK_GFM_EXPORT
 bool cmark_gfm_extensions_get_tasklist_item_checked(cmark_node *node);
 /* For backwards compatibility */
 #define cmark_gfm_extensions_tasklist_is_checked cmark_gfm_extensions_get_tasklist_item_checked
 
 /** Sets whether a tasklist item is "checked" (completed), returning 1 on success and 0 on error.
  */
-CMARK_GFM_EXTENSIONS_EXPORT
+CMARK_GFM_EXPORT
 int cmark_gfm_extensions_set_tasklist_item_checked(cmark_node *node, bool is_checked);
 
 #ifdef __cplusplus