#
# Copyright (c) 2013, 2026, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.  Oracle designates this
# particular file as subject to the "Classpath" exception as provided
# by Oracle in the LICENSE file that accompanied this code.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#

include Common.gmk

$(info TARGET=$(TARGET))
$(info HOST=$(HOST))
$(info BUILD=$(BUILD))

ifeq ($(BASE_OS)-$(BASE_OS_VERSION)-$(ARCH), OL-7-aarch64)
  KERNEL_HEADERS_RPM := kernel-uek-headers
else
  KERNEL_HEADERS_RPM := kernel-headers
endif

ifneq ($(BASE_OS)-$(BASE_OS_VERSION), OL-6)
  WAYLAND_RPMS := wayland-devel wayland-protocols-devel
endif

ZLIB_RPMS := zlib zlib-devel
ifeq ($(BASE_OS), Fedora)
  ifneq ($(ARCH), armhfp)
    ZLIB_RPMS := zlib-ng zlib-ng-devel
  endif
endif


################################################################################

# RPMs to include
RPM_LIST := \
    filesystem \
    $(KERNEL_HEADERS_RPM) \
    glibc glibc-devel \
    cups-libs cups-devel \
    libX11 libX11-devel \
    libxcb xorg-x11-proto-devel \
    alsa-lib alsa-lib-devel \
    libXext libXext-devel \
    libXtst libXtst-devel \
    libXrender libXrender-devel \
    libXrandr libXrandr-devel \
    freetype freetype-devel \
    libXt libXt-devel \
    libSM libSM-devel \
    libICE libICE-devel \
    libXi libXi-devel \
    libXau libXau-devel \
    libgcc \
    $(ZLIB_RPMS) \
    libffi libffi-devel \
    fontconfig fontconfig-devel \
    systemtap-sdt-devel \
    $(WAYLAND_RPMS) \
    #

################################################################################
# Define common directories and files

DOWNLOAD := $(OUTPUT_ROOT)/download
DOWNLOAD_RPMS := $(DOWNLOAD)/rpms/$(TARGET)-$(BASE_OS)-$(BASE_OS_VERSION)
SRCDIR := $(OUTPUT_ROOT)/src

################################################################################
# Marker files

DOWNLOAD_RPMS_MARKER := $(BUILDDIR)/download-rpms.marker
RPMS_UNPACKED_MARKER := $(BUILDDIR)/rpms_unpacked.marker
UNPATCHED_SYSROOT_MARKER := $(BUILDDIR)/sysroot_unpatched.marker
PATCHED_SYSROOT_MARKER := $(BUILDDIR)/sysroot_patched.marker

################################################################################
# Download RPMs

ifeq ($(ARCH), armhfp)
  RPM_ARCH := armv7hl
else
  RPM_ARCH := $(ARCH)
endif

RPM_ARCHS := $(RPM_ARCH) noarch
ifeq ($(ARCH), x86_64)
  # Enable mixed mode.
  RPM_ARCHS += i386 i686
endif

EMPTY :=
SPACE := $(EMPTY) $(EMPTY)
COMMA := ,
DNF_ARCHS := $(subst $(SPACE),$(COMMA),$(RPM_ARCHS))

# Specify a dummy installation root, otherwise dnf will run into
# problems trying to reconcile with the local/system state
DNF_DUMMY_INSTALL_ROOT := $(BUILDDIR)/dnf-dummy-install-root

DNF_REPOS := $(foreach repo, $(BASE_OS_REPOS), \
    --repofrompath $(repo) \
    --enablerepo $(word 1,$(subst $(COMMA),$(SPACE),$(repo))))

DNF_DOWNLOAD_FLAGS := \
    --disablerepo='*' \
    $(DNF_REPOS) \
    --resolve \
    --archlist $(DNF_ARCHS) \
    --forcearch $(RPM_ARCH) \
    --installroot $(DNF_DUMMY_INSTALL_ROOT) \
    --releasever $(BASE_OS_VERSION) \
    #

$(DOWNLOAD_RPMS_MARKER):
	@mkdir -p $(@D)
	mkdir -p $(DOWNLOAD_RPMS)
	echo $(RPM_LIST) | \
	    xargs dnf download $(DNF_DOWNLOAD_FLAGS) --destdir $(DOWNLOAD_RPMS)
	touch $@

################################################################################
# Unpack RPMS

RPM_PATTERNS := $(foreach arch,$(RPM_ARCHS),$(DOWNLOAD_RPMS)/*.$(arch).rpm)

CPIO_EXCLUDES := \
    "./usr/share/doc/*" \
    "./usr/share/man/*" \
    "./usr/X11R6/man/*" \
    "*/X11/locale/*" \
    #

$(RPMS_UNPACKED_MARKER): $(DOWNLOAD_RPMS_MARKER)
	if [ -d $(SYSROOT) ]; then echo "WARNING: Sysroot directory ($(SYSROOT)) already exists, proceeding anyway..."; fi
	@mkdir -p $(SYSROOT)
        # The -e test below is needed to skip unmatched glob patterns
	( \
	  cd $(SYSROOT); \
	  for rpm in $(RPM_PATTERNS); do \
	    if [ ! -e "$$rpm" ]; then continue; fi; \
	    echo Extracting $$rpm...; \
	    rpm2cpio $$rpm | \
	        cpio --extract --make-directories -f $(CPIO_EXCLUDES) \
	            || exit 1; \
	  done \
	)
	touch $@

################################################################################

$(UNPATCHED_SYSROOT_MARKER): $(RPMS_UNPACKED_MARKER)
	touch $@

################################################################################
# Patch sysroot

# Note: MUST create a <sysroot>/usr/lib even if not really needed.
# gcc will use a path relative to it to resolve lib64. (x86_64).
# we're creating multi-lib compiler with 32bit libc as well, so we should
# have it anyway, but just to make sure...
# Patch GNU ld scripts to force linking against libraries in the sysroot
# and not the ones installed on the build machine.

LD_SCRIPT_PATCHES := \
    -e 's|/usr/lib64/||g' \
    -e 's|/usr/lib/||g' \
    -e 's|/lib64/||g' \
    -e 's|/lib/||g' \
    #

$(PATCHED_SYSROOT_MARKER): $(UNPATCHED_SYSROOT_MARKER)
	@echo Patching GNU ld scripts
	@( \
	  for f in $$(find $(SYSROOT) -name "*.so" -type f 2>/dev/null); do \
	    if grep -Iq 'GNU ld script' "$$f"; then \
	      sed $(LD_SCRIPT_PATCHES) "$$f" > "$$f.tmp" && \
	      mv "$$f.tmp" "$$f"; \
	    fi; \
	  done \
	)
	@mkdir -p $(SYSROOT)/usr/lib
	@touch $@

################################################################################

download-rpms: $(DOWNLOAD_RPMS_MARKER)
unpatched-sysroot: $(UNPATCHED_SYSROOT_MARKER)
sysroot: $(PATCHED_SYSROOT_MARKER)

.PHONY: download-rpms unpatched-sysroot sysroot