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use an in-tree header for symbol export information #453

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use an in-tree header for symbol export information #453

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15 changes: 6 additions & 9 deletions src/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,6 @@ configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmark_version.h.in
${CMAKE_CURRENT_BINARY_DIR}/cmark_version.h)

include(GNUInstallDirs)
include (GenerateExportHeader)

add_executable(${PROGRAM} ${PROGRAM_SOURCES})
cmark_add_compile_options(${PROGRAM})
Expand Down Expand Up @@ -87,12 +86,15 @@ if (CMARK_SHARED)
$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>)
add_library(cmark::cmark ALIAS ${LIBRARY})

generate_export_header(${LIBRARY}
BASE_NAME ${PROJECT_NAME})

list(APPEND CMARK_INSTALL ${LIBRARY})
set(CMARK_STATIC_DEFINE 0)
else()
set(CMARK_STATIC_DEFINE 1)
endif()

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmark_export.h.in
${CMAKE_CURRENT_BINARY_DIR}/cmark_export.h)

if (CMARK_STATIC)
add_library(${STATICLIBRARY} STATIC ${LIBRARY_SOURCES})
cmark_add_compile_options(${STATICLIBRARY})
Expand All @@ -113,11 +115,6 @@ if (CMARK_STATIC)
$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>)
add_library(cmark::cmark_static ALIAS ${STATICLIBRARY})

if (NOT CMARK_SHARED)
generate_export_header(${STATICLIBRARY}
BASE_NAME ${PROJECT_NAME})
endif()

list(APPEND CMARK_INSTALL ${STATICLIBRARY})
endif()

Expand Down
38 changes: 38 additions & 0 deletions src/cmark_export.h.in
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Original file line number Diff line number Diff line change
@@ -0,0 +1,38 @@
#ifndef CMARK_EXPORT_H
#define CMARK_EXPORT_H

/* Is this an exclusively static build */
#if @CMARK_STATIC_DEFINE@ && ! defined CMARK_STATIC_DEFINE
# define CMARK_STATIC_DEFINE
#endif

/*
* Here is the complicated part. Windows is special -- you cannot just define
* entry points unconditionally.
* */
#if defined _WIN32 || defined __CYGWIN__
/* When building static libraries, avoid marking public ones */
# if defined CMARK_STATIC_DEFINE
# define CMARK_EXPORT
/* We are building this library */
# elif defined libcmark_EXPORTS
# define CMARK_EXPORT __declspec(dllexport)
/* We are using this library */
# else
# define CMARK_EXPORT __declspec(dllimport)
# endif

/* On to the easy part. GCC and lookalikes such as clang just work */
#elif defined __GNUC__ && __GNUC__ >= 4
# define CMARK_EXPORT __attribute__((visibility("default")))

/* Older solaris support, why not */
#elif defined __SUNPRO_C && __SUNPRO_C >= 0x550
# define CMARK_EXPORT __global

/* All else failed, and we don't know about this compiler. Be conservative. */
#else
# define CMARK_EXPORT
#endif

#endif /* CMARK_EXPORT_H */