Merge pull request #10972 from rouault/embedded_resources

RFC102 implementation: embedded resources
OSGeo · Oct 29, 2024 · b4a3fde · b4a3fde
2 parents 1fd36d7 + a5fde40
commit b4a3fde
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Showing 90 changed files with 2,387 additions and 1,189 deletions.
diff --git a/.github/workflows/fedora_rawhide/build.sh b/.github/workflows/fedora_rawhide/build.sh
@@ -10,7 +10,17 @@ cmake ${GDAL_SOURCE_DIR:=..} \
   -DCMAKE_CXX_FLAGS="-std=c++20 -Werror -O1 -D_FORTIFY_SOURCE=2" \
   -DCMAKE_SHARED_LINKER_FLAGS="-lstdc++" \
   -DUSE_CCACHE=ON \
+  -DEMBED_RESOURCE_FILES=ON \
   -DCMAKE_INSTALL_PREFIX=/usr \
   -DWERROR_DEV_FLAG="-Werror=dev"
 make -j$(nproc)
 make -j$(nproc) install DESTDIR=/tmp/install-gdal
+
+ctest -V -j $(nproc)
+
+rm -rf data
+cmake ${GDAL_SOURCE_DIR:=..} \
+  -DUSE_ONLY_EMBEDDED_RESOURCE_FILES=ON
+rm -rf /tmp/install-gdal
+make -j$(nproc)
+make -j$(nproc) install DESTDIR=/tmp/install-gdal
diff --git a/.github/workflows/linux_build.yml b/.github/workflows/linux_build.yml
@@ -264,18 +264,31 @@ jobs:
         # FIXME the default BUILD_CMD here isn't working...we get an error
         # about the quotes not matching.
       - name: Build
+        env:
+          TRAVIS: yes
+          TRAVIS_BRANCH: ${{ matrix.travis_branch }}
+          BUILD_NAME: ${{ matrix.travis_branch }}
         run: |
           if test -f ".github/workflows/${{ matrix.id }}/${{ matrix.build_script }}"; then
             BUILD_CMD="$(pwd)/.github/workflows/${{ matrix.id }}/${{ matrix.build_script }}"
           else
             BUILD_CMD="sh -c 'cmake .. && make -j$(nproc)'"
           fi
 
+          # For cache
+          mkdir -p .gdal
+
           mkdir -p build-${{ matrix.id }}
           docker run --name gdal-build \
             --rm \
+            -e CI \
+            -e GITHUB_WORKFLOW \
+            -e TRAVIS \
+            -e TRAVIS_BRANCH \
+            -e BUILD_NAME \
             -e "GDAL_SOURCE_DIR=$(pwd)" \
             -u $(id -u ${USER}):$(id -g ${USER}) \
+            -v $(pwd)/.gdal:/.gdal:rw \
             -v $(pwd):$(pwd):rw \
             -v ${{ github.workspace }}/.ccache:/.ccache:rw \
             --workdir $(pwd)/build-${{ matrix.id }} \
@@ -322,7 +335,7 @@ jobs:
           fi
 
           # For cache
-          mkdir .gdal
+          mkdir -p .gdal
 
           docker run \
             -e CI \

diff --git a/autotest/gcore/basic_test.py b/autotest/gcore/basic_test.py
@@ -176,17 +176,20 @@ def test_basic_test_8():
         license_text.startswith("GDAL/OGR is released under the MIT license")
         or "GDAL/OGR Licensing" in license_text
     )
-
-    # Use a subprocess to avoid the cached license text
-    env = os.environ.copy()
-    env["GDAL_DATA"] = "tmp"
-    with open("tmp/LICENSE.TXT", "wt") as f:
-        f.write("fake_license")
-    license_text = subprocess.check_output(
-        [sys.executable, "basic_test_subprocess.py"], env=env
-    ).decode("utf-8")
-    os.unlink("tmp/LICENSE.TXT")
-    assert license_text.startswith("fake_license")
+    if "EMBED_RESOURCE_FILES=YES" in gdal.VersionInfo("BUILD_INFO"):
+        assert len(license_text) > 1000
+
+    if "USE_ONLY_EMBEDDED_RESOURCE_FILES=YES" not in gdal.VersionInfo("BUILD_INFO"):
+        # Use a subprocess to avoid the cached license text
+        env = os.environ.copy()
+        env["GDAL_DATA"] = "tmp"
+        with open("tmp/LICENSE.TXT", "wt") as f:
+            f.write("fake_license")
+        license_text = subprocess.check_output(
+            [sys.executable, "basic_test_subprocess.py"], env=env
+        ).decode("utf-8")
+        os.unlink("tmp/LICENSE.TXT")
+        assert license_text.startswith("fake_license")
 
 
 ###############################################################################

diff --git a/autotest/ogr/ogr_osm.py b/autotest/ogr/ogr_osm.py
@@ -921,6 +921,13 @@ def test_ogr_osm_tags_json_special_characters():
 
 def test_ogr_osmconf_ini():
 
+    if "EMBED_RESOURCE_FILES=YES" in gdal.VersionInfo(
+        "BUILD_INFO"
+    ) or "USE_ONLY_EMBEDDED_RESOURCE_FILES=YES" in gdal.VersionInfo("BUILD_INFO"):
+        pytest.skip(
+            "Test cannot work with EMBED_RESOURCE_FILES=YES/USE_ONLY_EMBEDDED_RESOURCE_FILES=YES"
+        )
+
     import configparser
 
     with ogr.Open("data/osm/test_json.pbf") as ds:

diff --git a/autotest/ogr/ogr_sxf.py b/autotest/ogr/ogr_sxf.py
@@ -71,11 +71,11 @@ def test_ogr_sxf_2():
 # Open SXF datasource with custom RSC file.
 
 
-def test_ogr_sxf_3():
+def test_ogr_sxf_3(tmp_path):
 
     lyr_names = ["SYSTEM", "Not_Classified"]
-    sxf_name = "tmp/test_ogr_sxf_3.sxf"
-    rsc_name = "tmp/test_ogr_sxf_3.rsc"
+    sxf_name = str(tmp_path / "test_ogr_sxf_3.sxf")
+    rsc_name = str(tmp_path / "test_ogr_sxf_3.rsc")
     fake_rsc = open(rsc_name, "w")
     fake_rsc.close()
     shutil.copy("data/sxf/100_test.sxf", sxf_name)

diff --git a/cmake/helpers/GdalDriverHelper.cmake b/cmake/helpers/GdalDriverHelper.cmake
@@ -559,3 +559,16 @@ macro(ogr_default_driver name desc)
     add_feature_info(ogr_${key} OGR_ENABLE_DRIVER_${key} "${desc}")
     add_subdirectory(${name})
 endmacro()
+
+function(add_driver_embedded_resources driver_target is_plugin_var c_filename)
+    add_library(${driver_target}_resources OBJECT ${c_filename})
+    gdal_standard_includes(${driver_target}_resources)
+    set_property(TARGET ${driver_target}_resources PROPERTY POSITION_INDEPENDENT_CODE ${GDAL_OBJECT_LIBRARIES_POSITION_INDEPENDENT_CODE})
+    target_compile_definitions(${driver_target} PRIVATE EMBED_RESOURCE_FILES)
+    set_target_properties(${driver_target}_resources PROPERTIES C_STANDARD 23)
+    if (${${is_plugin_var}})
+        target_sources(${driver_target} PRIVATE $<TARGET_OBJECTS:${driver_target}_resources>)
+    else()
+        target_sources(${GDAL_LIB_TARGET_NAME} PRIVATE $<TARGET_OBJECTS:${driver_target}_resources>)
+    endif()
+endfunction()
diff --git a/doc/source/development/building_from_source.rst b/doc/source/development/building_from_source.rst
@@ -224,6 +224,36 @@ All cached entries can be viewed using ``cmake -LAH`` from a build directory.
     `CMAKE_SKIP_INSTALL_RPATH <https://cmake.org/cmake/help/latest/variable/CMAKE_SKIP_INSTALL_RPATH.html>`__
     variable is not set.
 
+Resource files embedding
+++++++++++++++++++++++++
+
+Starting with GDAL 3.11, if a C23-compatible compiler is used, such as
+clang >= 19 or GCC >= 15, it is possible to embed resource files inside
+the GDAL library, without relying on resource files to be available on the file
+system (such resource files are located through an hard-coded
+path at build time in ``${CMAKE_INSTALL_PREFIX}/share/gdal``, or at run-time
+through the :config:`GDAL_DATA` configuration option).
+
+The following CMake options control that behavior:
+
+.. option:: EMBED_RESOURCE_FILES=ON/OFF
+
+    .. versionadded:: 3.11
+
+    Default is OFF for shared library builds (BUILD_SHARED_LIBS=ON), and ON
+    for static library builds (BUILD_SHARED_LIBS=OFF).
+    When ON, resource files needed by GDAL will be embedded into the GDAL library
+    and/or relevant plugins.
+
+.. option:: USE_ONLY_EMBEDDED_RESOURCE_FILES=ON/OFF
+
+    .. versionadded:: 3.11
+
+    Even if EMBED_RESOURCE_FILES=ON, GDAL will still try to locate resource
+    files on the file system by default , and fallback to the embedded version if
+    not found. By setting USE_ONLY_EMBEDDED_RESOURCE_FILES=ON, no attempt
+    at locating resource files on the file system is made. Default is OFF.
+
 CMake package dependent options
 +++++++++++++++++++++++++++++++
 

diff --git a/doc/source/spelling_wordlist.txt b/doc/source/spelling_wordlist.txt
@@ -370,6 +370,7 @@ cid
 CInt
 circularstrings
 ClampRequests
+clang
 ClassificationCode
 Clayers
 CleanTimeout

diff --git a/frmts/grib/CMakeLists.txt b/frmts/grib/CMakeLists.txt
@@ -59,77 +59,86 @@ endif()
 
 gdal_standard_includes(gdal_GRIB)
 
-set(GDAL_DATA_FILES
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_versions.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_center.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_process.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_subcenter.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_0.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_13.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_14.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_15.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_16.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_17.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_18.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_190.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_191.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_19.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_1.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_20.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_21.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_2.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_3.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_4.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_5.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_6.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_7.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_10_0.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_10_191.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_10_1.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_10_2.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_10_3.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_10_4.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_1_0.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_1_1.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_1_2.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_20_0.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_20_1.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_20_2.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_2_0.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_2_3.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_2_4.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_2_5.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_2_6.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_0.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_1.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_2.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_3.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_4.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_5.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_6.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_0.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_10.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_1.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_2.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_3.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_4.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_5.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_6.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_7.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_8.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_9.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_local_Canada.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_local_HPC.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_local_index.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_local_MRMS.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_local_NCEP.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_local_NDFD.csv
-    ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_5.csv
-)
-set_property(
-  TARGET ${GDAL_LIB_TARGET_NAME}
-  APPEND
-  PROPERTY RESOURCE "${GDAL_DATA_FILES}")
+if (NOT USE_ONLY_EMBEDDED_RESOURCE_FILES)
+    set(GDAL_DATA_FILES
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_versions.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_center.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_process.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_subcenter.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_0.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_13.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_14.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_15.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_16.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_17.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_18.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_190.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_191.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_19.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_1.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_20.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_21.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_2.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_3.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_4.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_5.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_6.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_0_7.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_10_0.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_10_191.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_10_1.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_10_2.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_10_3.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_10_4.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_1_0.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_1_1.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_1_2.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_20_0.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_20_1.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_20_2.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_2_0.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_2_3.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_2_4.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_2_5.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_2_6.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_0.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_1.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_2.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_3.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_4.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_5.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_3_6.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_0.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_10.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_1.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_2.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_3.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_4.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_5.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_6.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_7.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_8.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_4_9.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_local_Canada.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_local_HPC.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_local_index.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_local_MRMS.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_local_NCEP.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_2_local_NDFD.csv
+        ${CMAKE_CURRENT_SOURCE_DIR}/data/grib2_table_4_5.csv
+    )
+    set_property(
+      TARGET ${GDAL_LIB_TARGET_NAME}
+      APPEND
+      PROPERTY RESOURCE "${GDAL_DATA_FILES}")
+endif()
+
+if (EMBED_RESOURCE_FILES)
+    add_driver_embedded_resources(gdal_GRIB GDAL_ENABLE_DRIVER_GRIB_PLUGIN degrib/degrib/embedded_resources.c)
+endif()
+if (USE_ONLY_EMBEDDED_RESOURCE_FILES)
+    target_compile_definitions(gdal_GRIB PRIVATE USE_ONLY_EMBEDDED_RESOURCE_FILES)
+endif()
 
 target_include_directories(
   gdal_GRIB PRIVATE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/degrib/degrib>

diff --git a/frmts/grib/degrib/degrib/embedded_resources.c b/frmts/grib/degrib/degrib/embedded_resources.c
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: MIT
+// Copyright 2024, Even Rouault <even.rouault at spatialys.com>
+
+#include "embedded_resources.h"
+
+#include "embedded_resources_gen1.c"
+
+const char *GRIBGetCSVFileContent(const char* pszFilename)
+{
+    static const struct
+    {
+        const char* pszFilename;
+        const char* pszContent;
+    } asResources[] = {
+#include "embedded_resources_gen2.c"
+    };
+    for( size_t i = 0; i < sizeof(asResources) / sizeof(asResources[0]); ++i )
+    {
+        if( strcmp(pszFilename, asResources[i].pszFilename) == 0 )
+            return asResources[i].pszContent;
+    }
+    return NULL;
+}
diff --git a/frmts/grib/degrib/degrib/embedded_resources.h b/frmts/grib/degrib/degrib/embedded_resources.h
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: MIT
+// Copyright 2024, Even Rouault <even.rouault at spatialys.com>
+
+#include "cpl_port.h"
+
+CPL_C_START
+
+const char *GRIBGetCSVFileContent(const char* pszFilename);
+
+CPL_C_END