sci-libs/opencascade: bump to 7.5.1

Closes: https://bugs.gentoo.org/762775
Package-Manager: Portage-3.0.14, Repoman-3.0.2
Signed-off-by: Bernd Waibel <waebbl-gentoo@posteo.net>
Closes: https://github.com/gentoo/gentoo/pull/20443
Signed-off-by: Sam James <sam@gentoo.org>

11 files changed, 477 insertions, 6 deletions

diff --git a/sci-libs/opencascade/Manifest b/sci-libs/opencascade/Manifest
index 3c6a4c44796a..77c4e42f391f 100644
--- a/sci-libs/opencascade/Manifest
+++ b/sci-libs/opencascade/Manifest
@@ -1 +1,2 @@
 DIST opencascade-7.4.0.tar.gz 49210449 BLAKE2B c92afe7551e9a066ad0940dcf49278b556a726f0534131706b3a11cb0986ba32818e162df3982283f6815eb9d67d7e91f909485d78f2b8d638da1934ffbc2f7f SHA512 eb0d47848d48f42a159ae5d7a4144483ba1f59f634844bd2053e48e04af30a30ba7056112cd38a1730d193a8d736b898f9608dd574cbe6829dbe7257a002772a
+DIST opencascade-7.5.1.tar.gz 47807222 BLAKE2B b5ef30ea7c373250db3e0863f3c7fde84256b37957a482f10a462a4c4ed1a21cffbbeb10e9fc140325022d7582efbd292ed6d1016d14cb67ccf5c84d14060d5a SHA512 ebb937254ac165041ef7e1a80df8f9d2ac1d518f01b3d4b0fd6d203fe0d80bd474b85a462cccc1c74a513bd257c0b0ab7002632573f38bf72170363c7e42ed2f
diff --git a/sci-libs/opencascade/files/opencascade-7.4.0.env.in b/sci-libs/opencascade/files/opencascade-7.4.0.env.in
index 2eefe188c1ab..cf7cc6a724df 100644
--- a/sci-libs/opencascade/files/opencascade-7.4.0.env.in
+++ b/sci-libs/opencascade/files/opencascade-7.4.0.env.in
@@ -76,7 +76,7 @@ LDPATH=VAR_CASROOT/lib
 # CSF_EXCEPTION_PROMPT (default: 1) optional
 #   not documented upstream (maybe a flag indicating whether the user shall
 #   be prompted in the case of exceptions)
-CSF_EXCEPTION_PROMPT=1
+#CSF_EXCEPTION_PROMPT=1
 
 # The following CSF_* variables define various directories and files where
 # OCCT is looking for resources.
@@ -93,8 +93,8 @@ CSF_IGESDefaults=VAR_CASROOT/share/opencascade/resources/XSTEPResource
 CSF_ShadersDirectory=VAR_CASROOT/share/opencascade/resources/Shaders
 CSF_SHMessage=VAR_CASROOT/share/opencascade/resources/SHMessage
 CSF_STEPDefaults=VAR_CASROOT/share/opencascade/resources/XSTEPResource
-CSF_UnitsDefinition=/usr/lib64/opencascade-7.3.0/ros/share/opencascade/resources/UnitsAPI/Units.dat
-CSF_XSMessage=/usr/lib64/opencascade-7.3.0/ros/share/opencascade/resources/XSMessage
+CSF_UnitsDefinition=VAR_CASROOT/share/opencascade/resources/UnitsAPI/Units.dat
+CSF_XSMessage=VAR_CASROOT/share/opencascade/resources/XSMessage
 
 # TODO: check those
 # they were defined in the original ebuild but the directories and files
diff --git a/sci-libs/opencascade/files/opencascade-7.5.1-0001-allow-default-search-path-for-Qt5.patch b/sci-libs/opencascade/files/opencascade-7.5.1-0001-allow-default-search-path-for-Qt5.patch
new file mode 100644
index 000000000000..68be3e1c8803
--- /dev/null
+++ b/sci-libs/opencascade/files/opencascade-7.5.1-0001-allow-default-search-path-for-Qt5.patch
@@ -0,0 +1,26 @@
+From c7d8a7374284186136d72fc285f9e55045b306fb Mon Sep 17 00:00:00 2001
+From: Bernd Waibel <waebbl@gmail.com>
+Date: Wed, 3 Feb 2021 23:31:23 +0100
+Subject: [PATCH] allow default search path for Qt5
+
+Signed-off-by: Bernd Waibel <waebbl@gmail.com>
+---
+ adm/cmake/qt.cmake | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/adm/cmake/qt.cmake b/adm/cmake/qt.cmake
+index 535e6a20..6c2141dd 100644
+--- a/adm/cmake/qt.cmake
++++ b/adm/cmake/qt.cmake
+@@ -24,7 +24,7 @@ set(CMAKE_PREFIX_PATH ${3RDPARTY_QT_DIR})
+ 
+ # Now we can apply standard CMake finder for Qt5. We do this mostly
+ # to have qt5_wrap_cpp() function available and Qt5_FOUND variable filled
+-find_package(Qt5 QUIET COMPONENTS Widgets Quick Xml PATHS ${3RDPARTY_QT_DIR} NO_DEFAULT_PATH)
++find_package(Qt5 COMPONENTS Widgets Quick Xml REQUIRED)
+ if (NOT ${Qt5_FOUND})
+   # Now we can apply standard CMake finder for Qt. We do this mostly
+   # to have qt4_wrap_cpp() function available
+-- 
+2.30.0
+
diff --git a/sci-libs/opencascade/files/opencascade-7.5.1-0002-remove-unnecessary-Qt5-check.patch b/sci-libs/opencascade/files/opencascade-7.5.1-0002-remove-unnecessary-Qt5-check.patch
new file mode 100644
index 000000000000..91d5c66c7614
--- /dev/null
+++ b/sci-libs/opencascade/files/opencascade-7.5.1-0002-remove-unnecessary-Qt5-check.patch
@@ -0,0 +1,28 @@
+From dcf67dbc486a97256ea6df7b968f69346e7b3dba Mon Sep 17 00:00:00 2001
+From: Bernd Waibel <waebbl@gmail.com>
+Date: Wed, 3 Feb 2021 23:45:27 +0100
+Subject: [PATCH] remove unnecessary Qt5 check
+
+Signed-off-by: Bernd Waibel <waebbl@gmail.com>
+---
+ adm/cmake/qt_macro.cmake | 4 ----
+ 1 file changed, 4 deletions(-)
+
+diff --git a/adm/cmake/qt_macro.cmake b/adm/cmake/qt_macro.cmake
+index ec897384..363d9c52 100644
+--- a/adm/cmake/qt_macro.cmake
++++ b/adm/cmake/qt_macro.cmake
+@@ -2,10 +2,6 @@
+ 
+ macro (FIND_QT_PACKAGE PROJECT_LIBRARIES_DEBUG PROJECT_LIBRARIES_RELEASE PROJECT_INCLUDES)
+ 
+-  if ("${3RDPARTY_QT_DIR}" STREQUAL "")
+-    message (FATAL_ERROR "Empty Qt dir")
+-  endif()
+-
+   if (${Qt5_FOUND})
+     #message (STATUS "Qt5 cmake configuration")
+ 
+-- 
+2.30.0
+
diff --git a/sci-libs/opencascade/files/opencascade-7.5.1-0003-add-Gentoo-configuration-type.patch b/sci-libs/opencascade/files/opencascade-7.5.1-0003-add-Gentoo-configuration-type.patch
new file mode 100644
index 000000000000..0665790d20a1
--- /dev/null
+++ b/sci-libs/opencascade/files/opencascade-7.5.1-0003-add-Gentoo-configuration-type.patch
@@ -0,0 +1,26 @@
+From a8aa40ec021dac8310d77bcec71ee298f6773926 Mon Sep 17 00:00:00 2001
+From: Bernd Waibel <waebbl@gmail.com>
+Date: Thu, 4 Feb 2021 22:29:57 +0100
+Subject: [PATCH] add Gentoo configuration type
+
+Signed-off-by: Bernd Waibel <waebbl@gmail.com>
+---
+ CMakeLists.txt | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 100d6133..887a1cd7 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -4,7 +4,7 @@ set (CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/adm/cmake")
+ 
+ set (CMAKE_SUPPRESS_REGENERATION TRUE)
+ 
+-set (CMAKE_CONFIGURATION_TYPES Release Debug RelWithDebInfo CACHE INTERNAL "" FORCE)
++set (CMAKE_CONFIGURATION_TYPES Release Debug RelWithDebInfo Gentoo CACHE INTERNAL "" FORCE)
+ 
+ # macro: include patched file if it exists
+ macro (OCCT_INCLUDE_CMAKE_FILE BEING_INCLUDED_FILE)
+-- 
+2.30.0
+
diff --git a/sci-libs/opencascade/files/opencascade-7.5.1-0004-fix-installation-of-cmake-config-files.patch b/sci-libs/opencascade/files/opencascade-7.5.1-0004-fix-installation-of-cmake-config-files.patch
new file mode 100644
index 000000000000..caace23fc2d8
--- /dev/null
+++ b/sci-libs/opencascade/files/opencascade-7.5.1-0004-fix-installation-of-cmake-config-files.patch
@@ -0,0 +1,40 @@
+From 8469f927963fe4bece05297c514fb2b9f9ad9b1a Mon Sep 17 00:00:00 2001
+From: Bernd Waibel <waebbl@gmail.com>
+Date: Fri, 5 Feb 2021 13:44:15 +0100
+Subject: [PATCH] fix installation of cmake config files
+
+Signed-off-by: Bernd Waibel <waebbl@gmail.com>
+---
+ CMakeLists.txt              | 2 +-
+ adm/cmake/occt_macros.cmake | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 100d6133..bc8cdb92 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -1156,7 +1156,7 @@ foreach (OCCT_CONFIGURATION ${CMAKE_CONFIGURATION_TYPES})
+ endforeach()
+ # install OpenCASCADE config file with compile definitions and C/C++ flags ONLY for current configuration
+ install (CODE "string (TOLOWER \"\${CMAKE_INSTALL_CONFIG_NAME}\" CMAKE_INSTALL_CONFIG_NAME_LOWER)")
+-install (CODE "configure_file(\"${CMAKE_BINARY_DIR}/OpenCASCADECompileDefinitionsAndFlags-\${CMAKE_INSTALL_CONFIG_NAME_LOWER}.cmake\" \"${INSTALL_DIR}/${INSTALL_DIR_CMAKE}/OpenCASCADECompileDefinitionsAndFlags-\${CMAKE_INSTALL_CONFIG_NAME_LOWER}.cmake\" COPYONLY)")
++install (CODE "configure_file(\"${CMAKE_BINARY_DIR}/OpenCASCADECompileDefinitionsAndFlags-\${CMAKE_INSTALL_CONFIG_NAME_LOWER}.cmake\" \"${INSTALL_DIR_CMAKE}/OpenCASCADECompileDefinitionsAndFlags-\${CMAKE_INSTALL_CONFIG_NAME_LOWER}.cmake\" COPYONLY)")
+ 
+ foreach (OCCT_MODULE ${OCCT_MODULES})
+   if (BUILD_MODULE_${OCCT_MODULE})
+diff --git a/adm/cmake/occt_macros.cmake b/adm/cmake/occt_macros.cmake
+index 0a387945..f10fe5e3 100644
+--- a/adm/cmake/occt_macros.cmake
++++ b/adm/cmake/occt_macros.cmake
+@@ -592,7 +592,7 @@ macro (OCCT_UPDATE_TARGET_FILE)
+   "cmake_policy(PUSH)
+   cmake_policy(SET CMP0007 NEW)
+   string (TOLOWER \"\${CMAKE_INSTALL_CONFIG_NAME}\" CMAKE_INSTALL_CONFIG_NAME_LOWERCASE)
+-  file (GLOB ALL_OCCT_TARGET_FILES \"${INSTALL_DIR}/${INSTALL_DIR_CMAKE}/OpenCASCADE*Targets-\${CMAKE_INSTALL_CONFIG_NAME_LOWERCASE}.cmake\")
++  file (GLOB ALL_OCCT_TARGET_FILES \"${INSTALL_DIR_CMAKE}/OpenCASCADE*Targets-\${CMAKE_INSTALL_CONFIG_NAME_LOWERCASE}.cmake\")
+   foreach(TARGET_FILENAME \${ALL_OCCT_TARGET_FILES})
+     file (STRINGS \"\${TARGET_FILENAME}\" TARGET_FILE_CONTENT)
+     file (REMOVE \"\${TARGET_FILENAME}\")
+-- 
+2.30.0
+
diff --git a/sci-libs/opencascade/files/opencascade-7.5.1-0005-fix-write-permissions-on-scripts.patch b/sci-libs/opencascade/files/opencascade-7.5.1-0005-fix-write-permissions-on-scripts.patch
new file mode 100644
index 000000000000..1cb397e0a976
--- /dev/null
+++ b/sci-libs/opencascade/files/opencascade-7.5.1-0005-fix-write-permissions-on-scripts.patch
@@ -0,0 +1,43 @@
+From 5f7db00bfc56d497a1897102a5ddd5bdddd72942 Mon Sep 17 00:00:00 2001
+From: Bernd Waibel <waebbl-gentoo@posteo.net>
+Date: Fri, 16 Apr 2021 01:04:24 +0200
+Subject: [PATCH] fix write permissions on scripts
+
+Signed-off-by: Bernd Waibel <waebbl-gentoo@posteo.net>
+---
+ CMakeLists.txt | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 100d6133..e9e8fb29 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -890,10 +890,10 @@ if (${DRAWEXE_INDEX} GREATER -1)
+   # copy draw script to install script folder
+   if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/adm/templates/draw.${SCRIPT_EXT}")
+     install (FILES "${BUILD_PATCH}/adm/templates/draw.${SCRIPT_EXT}" DESTINATION  "${INSTALL_DIR_SCRIPT}"
+-            PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_WRITE GROUP_EXECUTE WORLD_READ WORLD_WRITE WORLD_EXECUTE)
++            PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
+   else()
+     install (FILES "${CMAKE_SOURCE_DIR}/adm/templates/draw.${SCRIPT_EXT}" DESTINATION  "${INSTALL_DIR_SCRIPT}"
+-            PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_WRITE GROUP_EXECUTE WORLD_READ WORLD_WRITE WORLD_EXECUTE)
++            PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
+   endif()
+ 
+   # copy draw script to CMake binary folder
+@@ -1101,10 +1101,10 @@ if (BUILD_TOOL_TOOLKITS)
+   # copy tinspector script to install script folder
+   if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/adm/templates/inspector.${SCRIPT_EXT}")
+     install (FILES "${BUILD_PATCH}/adm/templates/inspector.${SCRIPT_EXT}" DESTINATION  "${INSTALL_DIR_SCRIPT}"
+-            PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_WRITE GROUP_EXECUTE WORLD_READ WORLD_WRITE WORLD_EXECUTE)
++            PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
+   else()
+     install (FILES "${CMAKE_SOURCE_DIR}/adm/templates/inspector.${SCRIPT_EXT}" DESTINATION  "${INSTALL_DIR_SCRIPT}"
+-            PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_WRITE GROUP_EXECUTE WORLD_READ WORLD_WRITE WORLD_EXECUTE)
++            PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
+   endif()
+ 
+   set (OpenCASCADE_BINARY_DIR "${INSTALL_DIR}/${INSTALL_DIR_BIN}")
+-- 
+2.31.1
+
diff --git a/sci-libs/opencascade/files/opencascade-7.5.1-0006-fix-creation-of-custom.sh-script.patch b/sci-libs/opencascade/files/opencascade-7.5.1-0006-fix-creation-of-custom.sh-script.patch
new file mode 100644
index 000000000000..0ab023693e65
--- /dev/null
+++ b/sci-libs/opencascade/files/opencascade-7.5.1-0006-fix-creation-of-custom.sh-script.patch
@@ -0,0 +1,34 @@
+From 0df9b2c485da92c6e9fdd6d4b5ea1ec6588bd66f Mon Sep 17 00:00:00 2001
+From: Bernd Waibel <waebbl-gentoo@posteo.net>
+Date: Fri, 16 Apr 2021 14:32:24 +0200
+Subject: [PATCH] fix creation of custom.sh script
+
+Signed-off-by: Bernd Waibel <waebbl-gentoo@posteo.net>
+---
+ CMakeLists.txt | 10 +---------
+ 1 file changed, 1 insertion(+), 9 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 100d6133..7799b73a 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -909,15 +909,7 @@ else()
+ endif()
+ 
+  # change custom.bat/sh
+-if (EXISTS "${INSTALL_DIR}/${INSTALL_DIR_SCRIPT}/custom.${SCRIPT_EXT}")
+-  file (READ "${INSTALL_DIR}/${INSTALL_DIR_SCRIPT}/custom.${SCRIPT_EXT}" CUSTOM_CONTENT)
+-
+-  set (CUSTOM_CONTENT "${CUSTOM_CONTENT} ${ADDITIONAL_CUSTOM_CONTENT}")
+-
+-  file (WRITE "${INSTALL_DIR}/${INSTALL_DIR_SCRIPT}/custom.${SCRIPT_EXT}" "${CUSTOM_CONTENT}")
+-else()
+-  OCCT_CONFIGURE_AND_INSTALL ("adm/templates/custom.${SCRIPT_EXT}.main" "custom.${SCRIPT_EXT}" "custom.${SCRIPT_EXT}" "${INSTALL_DIR_SCRIPT}")
+-endif()
++OCCT_CONFIGURE_AND_INSTALL ("adm/templates/custom.${SCRIPT_EXT}.main" "custom.${SCRIPT_EXT}" "custom.${SCRIPT_EXT}" "${INSTALL_DIR_SCRIPT}")
+ 
+ if (WIN32)
+   set (THIRDPARTY_DIR_REPLACE "%THIRDPARTY_DIR%")
+-- 
+2.31.1
+
diff --git a/sci-libs/opencascade/files/opencascade-7.5.env.in b/sci-libs/opencascade/files/opencascade-7.5.env.in
new file mode 100644
index 000000000000..50766cbb6bb1
--- /dev/null
+++ b/sci-libs/opencascade/files/opencascade-7.5.env.in
@@ -0,0 +1,102 @@
+#
+# This file sets needed and optional environment variables for
+# Open CASCADE Technology
+#
+# See: https://dev.opencascade.org/doc/overview/html/index.html#OCCT_OVW_SECTION_4_2
+# for further documentation.
+#
+# Some of the values are set at compile time depending on what USE flags
+# were enabled. Those values are marked as such.
+
+# define the root directory of Open CASCADE Technology (needed)
+CASROOT=VAR_CASROOT
+PATH=VAR_CASROOT/lib/opencascade-VAR_PV/bin
+LDPATH=VAR_CASROOT/lib/opencascade-VAR_PV
+
+#############################################################################
+# The MMGT_* variables are used to determine how memory management will work
+# in OCCT. All of those are optional. If they are not set here, their default
+# values will be used.
+#
+# Uncomment or change the ones you need to adapt from its default.
+#############################################################################
+# MMGT_OPT = {0,1,2} (default: 0) set at compile time
+#   if set to 0 (the default), every memory block is allocated in C
+#      memory heap directly (via malloc() and free()). Will be set, if
+#      neither the the 'optimize' nor the 'tbb' USE flags are set.
+#   if set to 1, the memory manager performs it's own internal optimization.
+#      Will be set, if the 'optimize' USE flag is set.
+#   if set to 2, Intel(R) TBB optimized memory manager is used. Will be set,
+#      if the 'tbb' USE flag is set.
+#MMGT_OPT=0
+
+# MMGT_CLEAR = {0,1} (default: 1)
+#   if set to 0, memory block is returned as it is. Will be set, if the
+#      'optimize' USE flag is set
+#   if set to 1, every allocated memory block is cleared by zeros
+#MMGT_CLEAR=1
+
+# MMGT_CELLSIZE (default: 200)
+#   defines the maximal size of blocks allocated in large pools of memory.
+#MMGT_CELLSIZE=200
+
+# MMGT_NBPAGES (default: 10000)
+#   defines the size of memory chunks allocated for small blocks in pages
+#      (OS dependant)
+#MMGT_NBPAGES=10000
+
+# MMGT_THRESHOLD (default: 40000)
+#   defines the maximal size of blocks that are recycled internally instead
+#   of being returned to the heap.
+#MMGT_THRESHOLD=40000
+
+# MMGT_MMAP = {0,1} (default: 1)
+#   if set to 0, large memory blocks will be allocated in the C heap by
+#      malloc()
+#   if set to 1, large memory blocks are allocated using memory mapping
+#      functions of the operating system.
+#MMGT_MMAP=1
+
+# CSF_LANGUAGE (default: us) optional
+#   defines the default language of messages indicated by a two-letter
+#   country code. Currently it's not verified if this work with other
+#   than the default languages, so we keep it commented.
+#CSF_LANGUAGE=us
+
+# CSF_DEBUG_BOP (default: undefined) optional
+#   if defined then it should specify the directory where diagnostic data
+#   on problems occured in Boolean operations will be saved. Not defined by
+#   default.
+#
+# NOTE: Only enable for debugging purposes. If set, this variable has a
+# large impact on the performance of boolean operations.
+#CSF_DEBUG_BOP=/var/tmp
+
+# CSF_EXCEPTION_PROMPT (default: 1) optional
+#   not documented upstream (maybe a flag indicating whether the user shall
+#   be prompted in the case of exceptions)
+#CSF_EXCEPTION_PROMPT=1
+
+# The following CSF_* variables define various directories and files where
+# OCCT is looking for resources.
+CSF_GraphicShr=VAR_CASROOT/lib/opencascade-VAR_PV/libTKOpenGl.so
+CSF_MIGRATION_TYPES=VAR_CASROOT/share/opencascade-VAR_PV/resources/StdResource/MigrationSheet.txt
+CSF_MDTVTexturesDirectory=VAR_CASROOT/share/opencascade-VAR_PV/resources/Textures
+CSF_PluginDefaults=VAR_CASROOT/share/opencascade-VAR_PV/resources/StdResource
+CSF_StandardDefaults=VAR_CASROOT/share/opencascade-VAR_PV/resources/StdResource
+CSF_StandardLiteDefaults=VAR_CASROOT/share/opencascade-VAR_PV/resources/StdResource
+CSF_XCAFDefaults=VAR_CASROOT/share/opencascade-VAR_PV/resources/StdResource
+CSF_XmlOcafResource=VAR_CASROOT/share/opencascade-VAR_PV/resources/XmlOcafResource
+# The below values might be optional.
+CSF_IGESDefaults=VAR_CASROOT/share/opencascade-VAR_PV/resources/XSTEPResource
+CSF_ShadersDirectory=VAR_CASROOT/share/opencascade-VAR_PV/resources/Shaders
+CSF_SHMessage=VAR_CASROOT/share/opencascade-VAR_PV/resources/SHMessage
+CSF_STEPDefaults=VAR_CASROOT/share/opencascade-VAR_PV/resources/XSTEPResource
+CSF_UnitsDefinition=VAR_CASROOT/share/opencascade-VAR_PV/resources/UnitsAPI/Units.dat
+CSF_XSMessage=VAR_CASROOT/share/opencascade-VAR_PV/resources/XSMessage
+
+# TODO: check those
+# they were defined in the original ebuild but the directories and files
+# are not present in the current installation.
+#CSF_MDTVFontDirectory=VAR_CASROOT/src/FontMFT
+#CSF_UnitsLexicon=VAR_CASROOT/src/UnitsAPI/Lexi_Expr.dat
diff --git a/sci-libs/opencascade/metadata.xml b/sci-libs/opencascade/metadata.xml
index aa017491b603..9477ecff1347 100644
--- a/sci-libs/opencascade/metadata.xml
+++ b/sci-libs/opencascade/metadata.xml
@@ -11,7 +11,7 @@
 </maintainer>
 <use>
 	<flag name="freeimage">
-		Enable support for image i/o via media-libs/freeimage
+		Enable support for image i/o via <pkg>media-libs/freeimage</pkg>
 	</flag>
 	<flag name="gles2">
 		Use OpenGL ES 2.0
@@ -19,15 +19,19 @@
 	<flag name="inspector">
 		Build the OCCT inspector tool for low-level data inspection
 	</flag>
+	<flag name="json">
+		Enable JSON support through <pkg>dev-libs/rapidjson</pkg>
+	</flag>
 	<flag name="optimize">
 		Don't clear allocated memory. Use optimized memory manager unless
 		tbb USE flag is set.
 	</flag>
 	<flag name="tbb">
-		Enable multithreading with the Intel Threads Building Block dev-cpp/tbb
+		Enable multithreading with the Intel Threads Building Block
+		<pkg>dev-cpp/tbb</pkg>
 	</flag>
 	<flag name="vtk">
-		Enable Visualization Toolkit
+		Enable Visualization Toolkit support via <pkg>sci-libs/vtk</pkg>
 	</flag>
 </use>
 </pkgmetadata>
diff --git a/sci-libs/opencascade/opencascade-7.5.1.ebuild b/sci-libs/opencascade/opencascade-7.5.1.ebuild
new file mode 100644
index 000000000000..474b381f5561
--- /dev/null
+++ b/sci-libs/opencascade/opencascade-7.5.1.ebuild
@@ -0,0 +1,167 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# TODO:
+# check the src files referenced in 51opencascade, i.e. resources and the like
+
+EAPI=7
+
+inherit cmake flag-o-matic
+
+MY_PV="$(ver_rs 1- '_')"
+PV_MAJ="$(ver_cut 1-2)"
+
+DESCRIPTION="Development platform for CAD/CAE, 3D surface/solid modeling and data exchange"
+HOMEPAGE="https://www.opencascade.com"
+SRC_URI="https://git.dev.opencascade.org/gitweb/?p=occt.git;a=snapshot;h=refs/tags/V${MY_PV};sf=tgz -> ${P}.tar.gz"
+S="${WORKDIR}/occt-V${MY_PV}"
+
+LICENSE="|| ( Open-CASCADE-LGPL-2.1-Exception-1.0 LGPL-2.1 )"
+SLOT="${PV_MAJ}"
+KEYWORDS="~amd64 ~arm64 ~x86"
+IUSE="debug doc examples ffmpeg freeimage gles2 json optimize tbb vtk"
+
+REQUIRED_USE="?? ( optimize tbb )"
+
+# There's no easy way to test. Testing needs a rather big environment
+# properly set up.
+RESTRICT="test"
+
+RDEPEND="
+	app-eselect/eselect-opencascade
+	dev-cpp/eigen
+	dev-lang/tcl:0=
+	dev-lang/tk:0=
+	dev-libs/rapidjson
+	dev-tcltk/itcl
+	dev-tcltk/itk
+	dev-tcltk/tix
+	media-libs/fontconfig
+	media-libs/freetype:2
+	media-libs/ftgl
+	virtual/glu
+	virtual/opengl
+	x11-libs/libXmu
+	examples? (
+		dev-qt/qtcore:5
+		dev-qt/qtgui:5
+		dev-qt/qtquickcontrols2:5
+		dev-qt/qtwidgets:5
+		dev-qt/qtxml:5
+	)
+	ffmpeg? ( media-video/ffmpeg )
+	freeimage? ( media-libs/freeimage )
+	json? ( dev-libs/rapidjson )
+	tbb? ( dev-cpp/tbb )
+	vtk? ( >=sci-libs/vtk-8.1.0[rendering] )
+"
+DEPEND="${RDEPEND}"
+BDEPEND="
+	doc? ( app-doc/doxygen )
+	examples? ( dev-qt/linguist-tools:5 )
+"
+
+PATCHES=(
+	"${FILESDIR}"/${P}-0001-allow-default-search-path-for-Qt5.patch
+	"${FILESDIR}"/${P}-0002-remove-unnecessary-Qt5-check.patch
+	"${FILESDIR}"/${P}-0003-add-Gentoo-configuration-type.patch
+	"${FILESDIR}"/${P}-0004-fix-installation-of-cmake-config-files.patch
+	"${FILESDIR}"/${P}-0005-fix-write-permissions-on-scripts.patch
+	"${FILESDIR}"/${P}-0006-fix-creation-of-custom.sh-script.patch
+)
+
+src_prepare() {
+	cmake_src_prepare
+
+	if use debug; then
+		append-cppflags -DDEBUG
+		append-flags -g
+	fi
+
+	sed -e 's/\/lib\$/\/'$(get_libdir)'\$/' \
+		-i adm/templates/OpenCASCADEConfig.cmake.in || die
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DBUILD_DOC_Overview=$(usex doc)
+		-DBUILD_Inspector=$(usex examples)
+		-DBUILD_WITH_DEBUG=$(usex debug)
+		-DCMAKE_INSTALL_PREFIX="/usr"
+		-DINSTALL_DIR_BIN="$(get_libdir)/${P}/bin"
+		-DINSTALL_DIR_CMAKE="$(get_libdir)/cmake/${P}"
+		-DINSTALL_DIR_DOC="share/doc/${PF}"
+		-DINSTALL_DIR_LIB="$(get_libdir)/${P}"
+		-DINSTALL_DIR_SCRIPT="$(get_libdir)/${P}/bin"
+		-DINSTALL_DIR_WITH_VERSION=ON
+		-DINSTALL_SAMPLES=$(usex examples)
+		-DINSTALL_TEST_CASES=NO
+		-DUSE_D3D=NO
+		-DUSE_FFMPEG=$(usex ffmpeg)
+		-DUSE_FREEIMAGE=$(usex freeimage)
+		-DUSE_FREETYPE=ON
+		-DUSE_GLES2=$(usex gles2)
+		-DUSE_RAPIDJSON=$(usex json)
+		-DUSE_TBB=$(usex tbb)
+		-DUSE_VTK=$(usex vtk)
+	)
+
+	use doc && mycmakeargs+=( -DINSTALL_DOC_Overview=ON )
+
+	if use examples; then
+		mycmakeargs+=(
+			-D3RDPARTY_QT_DIR="${ESYSROOT}"/usr
+			-DBUILD_SAMPLES_QT=ON
+		)
+	fi
+
+	if use vtk; then
+		if has_version ">=sci-libs/vtk-9.0.0"; then
+			mycmakeargs+=(
+				-D3RDPARTY_VTK_DIR="${ESYSROOT}"/usr
+				-D3RDPARTY_VTK_INCLUDE_DIR="${ESYSROOT}"/usr/include/vtk-9.0
+				-D3RDPARTY_VTK_LIBRARY_DIR="${ESYSROOT}"/usr/$(get_libdir)
+			)
+		fi
+	fi
+
+	cmake_src_configure
+
+	prepare_env_file() {
+		# prepare /etc/env.d file
+		sed -e 's|VAR_CASROOT|'${ESYSROOT}'/usr|g' < "${FILESDIR}/${PN}-${PV_MAJ}.env.in" >> "${T}/${PV_MAJ}" || die
+		sed -e 's|lib/|'$(get_libdir)'/|g' -i "${T}/${PV_MAJ}" || die
+		sed -e 's|VAR_PV|'${PV}'|g' -i "${T}/${PV_MAJ}" || die
+
+		# use TBB for memory allocation optimizations?
+		use tbb && (sed -e 's|^#MMGT_OPT=0$|MMGT_OPT=2|' -i "${T}/${PV_MAJ}" || die)
+
+		if use optimize ; then
+			# use internal optimized memory manager?
+			sed -e 's|^#MMGT_OPT=0$|MMGT_OPT=1|' -i "${T}/${PV_MAJ}" || die
+			# don't clear memory ?
+			sed -e 's|^#MMGT_CLEAR=1$|MMGT_CLEAR=0|' -i "${T}/${PV_MAJ}" || die
+		fi
+	}
+
+	prepare_env_file
+}
+
+src_install() {
+	use doc && docompress -x /usr/share/doc/${PF}/overview/html
+	cmake_src_install
+
+	# respect slotting
+	insinto "/etc/env.d/${PN}"
+	doins "${T}/${PV_MAJ}"
+
+	# remove examples
+	if use !examples; then
+		rm -r "${ED}/usr/share/${P}/samples" || die
+	fi
+}
+
+pkg_postinst() {
+	eselect ${PN} set ${PV_MAJ} || die "failed to switch to updated implementation"
+	einfo "You can switch between available ${PN} implementations using eselect ${PN}"
+}