From 4a0584f7c05641143151ebdc1be1163bebf9d35d Mon Sep 17 00:00:00 2001
From: Las <las@protonmail.ch>
Date: Sun, 3 Jan 2021 18:35:37 +0000
Subject: [PATCH] Compile transupp.c as part of the library

The exported symbols are made weak to not conflict with users
of the library that already vendor this functionality.
---
 CMakeLists.txt |  4 ++--
 transupp.c     | 14 +++++++-------
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0ca6f98..a9a0fae 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -533,7 +533,7 @@ set(JPEG_SOURCES jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c
   jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c jdicc.c jdinput.c
   jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c jdpostct.c jdsample.c
   jdtrans.c jerror.c jfdctflt.c jfdctfst.c jfdctint.c jidctflt.c jidctfst.c
-  jidctint.c jidctred.c jquant1.c jquant2.c jutils.c jmemmgr.c jmemnobs.c)
+  jidctint.c jidctred.c jquant1.c jquant2.c jutils.c jmemmgr.c jmemnobs.c transupp.c)
 
 if(WITH_ARITH_ENC OR WITH_ARITH_DEC)
   set(JPEG_SOURCES ${JPEG_SOURCES} jaricom.c)
@@ -1489,7 +1489,7 @@ install(EXPORT ${CMAKE_PROJECT_NAME}Targets
 
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/jconfig.h
   ${CMAKE_CURRENT_SOURCE_DIR}/jerror.h ${CMAKE_CURRENT_SOURCE_DIR}/jmorecfg.h
-  ${CMAKE_CURRENT_SOURCE_DIR}/jpeglib.h
+  ${CMAKE_CURRENT_SOURCE_DIR}/jpeglib.h ${CMAKE_CURRENT_SOURCE_DIR}/transupp.h
   DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 
 include(cmakescripts/BuildPackages.cmake)
diff --git a/transupp.c b/transupp.c
index 6e86077..2da49a7 100644
--- a/transupp.c
+++ b/transupp.c
@@ -1386,7 +1386,7 @@ jt_read_integer(const char **strptr, JDIMENSION *result)
  * This code is loosely based on XParseGeometry from the X11 distribution.
  */
 
-GLOBAL(boolean)
+GLOBAL(boolean) __attribute__((weak))
 jtransform_parse_crop_spec(jpeg_transform_info *info, const char *spec)
 {
   info->crop = FALSE;
@@ -1486,7 +1486,7 @@ trim_bottom_edge(jpeg_transform_info *info, JDIMENSION full_height)
  * and transformation is not perfect.  Otherwise returns TRUE.
  */
 
-GLOBAL(boolean)
+GLOBAL(boolean) __attribute__((weak))
 jtransform_request_workspace(j_decompress_ptr srcinfo,
                              jpeg_transform_info *info)
 {
@@ -2033,7 +2033,7 @@ adjust_exif_parameters(JOCTET *data, unsigned int length, JDIMENSION new_width,
  * to jpeg_write_coefficients().
  */
 
-GLOBAL(jvirt_barray_ptr *)
+GLOBAL(jvirt_barray_ptr *) __attribute__((weak))
 jtransform_adjust_parameters(j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
                              jvirt_barray_ptr *src_coef_arrays,
                              jpeg_transform_info *info)
@@ -2152,7 +2152,7 @@ jtransform_adjust_parameters(j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
  * Note that some transformations will modify the source data arrays!
  */
 
-GLOBAL(void)
+GLOBAL(void) __attribute__((weak))
 jtransform_execute_transform(j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
                              jvirt_barray_ptr *src_coef_arrays,
                              jpeg_transform_info *info)
@@ -2264,7 +2264,7 @@ jtransform_execute_transform(j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
  *           (may use custom action then)
  */
 
-GLOBAL(boolean)
+GLOBAL(boolean) __attribute__((weak))
 jtransform_perfect_transform(JDIMENSION image_width, JDIMENSION image_height,
                              int MCU_width, int MCU_height,
                              JXFORM_CODE transform)
@@ -2303,7 +2303,7 @@ jtransform_perfect_transform(JDIMENSION image_width, JDIMENSION image_height,
  * This must be called before jpeg_read_header() to have the desired effect.
  */
 
-GLOBAL(void)
+GLOBAL(void) __attribute__((weak))
 jcopy_markers_setup(j_decompress_ptr srcinfo, JCOPY_OPTION option)
 {
 #ifdef SAVE_MARKERS_SUPPORTED
@@ -2331,7 +2331,7 @@ jcopy_markers_setup(j_decompress_ptr srcinfo, JCOPY_OPTION option)
  * JFIF APP0 or Adobe APP14 markers if selected.
  */
 
-GLOBAL(void)
+GLOBAL(void) __attribute__((weak))
 jcopy_markers_execute(j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
                       JCOPY_OPTION option)
 {
-- 
2.29.2