From e69f684dedb4a693e38fc8b948cdff8c7601674c Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbx@openadk.org>
Date: Sat, 13 Jan 2024 14:19:19 +0100
Subject: support nommu with ELF binaries

---
 toolchain/gcc/Makefile       | 20 +++++++++++++++-----
 toolchain/uclibc-ng/Makefile | 14 ++++++++++++++
 2 files changed, 29 insertions(+), 5 deletions(-)

(limited to 'toolchain')

diff --git a/toolchain/gcc/Makefile b/toolchain/gcc/Makefile
index 40e9600a7..723b4ae5a 100644
--- a/toolchain/gcc/Makefile
+++ b/toolchain/gcc/Makefile
@@ -165,10 +165,6 @@ ifeq ($(ADK_TARGET_ARCH_METAG),y)
 GCC_CONFOPTS+=		--with-cpu=2.1 --enable-meta-default --disable-symvers
 endif
 
-ifeq ($(ADK_TARGET_CPU_CF),y)
-GCC_CONFOPTS+=		--with-arch=cf --disable-multilib
-endif
-
 ifeq ($(ADK_TARGET_ARCH_NDS32),y)
 GCC_CONFOPTS+=		--with-arch=v3
 endif
@@ -177,6 +173,16 @@ ifeq ($(ADK_TARGET_ARCH_M68K)$(ADK_TARGET_ARCH_X86_64)$(ADK_TARGET_ARCH_X86),)
 GCC_FINAL_CONFOPTS+=	--disable-biarch --disable-multilib
 endif
 
+ifeq ($(ADK_TARGET_CPU_CF),y)
+GCC_CONFOPTS+=		--with-arch=cf
+GCC_INITIAL_CONFOPTS+=	--enable-multilib
+ifeq ($(ADK_TARGET_BINFMT_ELF)$(ADK_TARGET_WITH_MMU),y)
+GCC_FINAL_CONFOPTS+=	--disable-multilib --disable-threads --disable-libatomic
+endif
+else
+GCC_INITIAL_CONFOPTS+=	--disable-multilib
+endif
+
 ifeq ($(ADK_TARGET_ARCH_SH),y)
 
 ifeq ($(ADK_TARGET_LITTLE_ENDIAN),y)
@@ -309,6 +315,10 @@ ifeq ($(ADK_TARGET_CPU_SH_SH4A),y)
 	(cd ${STAGING_TARGET_DIR}/ && ln -sf . m4a)
 endif
 endif
+	# Need to get gcc to generate _all_ the multilib variants
+	# (so both MMU and non-mmu M68k and ColdFire).
+	$(SED) 's/M68K_MLIB_CPU +=/#M68K_MLIB_CPU +=/' $(WRKBUILD)/gcc/config/m68k/t-m68k
+	$(SED) 's/&& (FLAGS ~ "FL_MMU")//' $(WRKBUILD)/gcc/config/m68k/t-linux
 	$(SED) '/k prot/agcc_cv_libc_provides_ssp=yes' $(WRKBUILD)/gcc/configure
 	cd $(GCC_BUILD_DIR_INITIAL); \
 		PATH='$(TARGET_PATH)' \
@@ -317,13 +327,13 @@ endif
 		CFLAGS="-O0 -g0 -fomit-frame-pointer" \
 		CXXFLAGS="-O0 -g0 -fomit-frame-pointer" \
 		$(WRKBUILD)/configure \
+			${GCC_INITIAL_CONFOPTS} \
 			${GCC_CONFOPTS} \
 			${GCC_TLS_CONFOPTS} \
 			--enable-languages=c \
 			--with-newlib \
 			--disable-shared \
 			--disable-threads \
-			--disable-multilib \
 			--without-headers
 	touch $@
 
diff --git a/toolchain/uclibc-ng/Makefile b/toolchain/uclibc-ng/Makefile
index 5b0a6fdef..6b1fd31ce 100644
--- a/toolchain/uclibc-ng/Makefile
+++ b/toolchain/uclibc-ng/Makefile
@@ -50,8 +50,13 @@ UCLIBC_MAKEOPTS+=	-j${ADK_MAKE_JOBS}
 endif
 
 $(WRKBUILD)/.configured: $(WRKBUILD)/.prepared
+ifeq ($(ADK_TARGET_WITH_MMU),y)
 	PATH='$(HOST_PATH)' sed -e 's
^KERNEL_HEADERS.*$$
KERNEL_HEADERS=\"${STAGING_TARGET_DIR}/usr/include\"
' \
 	    $(ADK_TOPDIR)/target/$(ADK_TARGET_ARCH)/uclibc-ng.config >${WRKBUILD}/.config
+else
+	PATH='$(HOST_PATH)' sed -e 's
^KERNEL_HEADERS.*$$
KERNEL_HEADERS=\"${STAGING_TARGET_DIR}/usr/include\"
' \
+	    $(ADK_TOPDIR)/target/$(ADK_TARGET_ARCH)/uclibc-ng-nommu.config >${WRKBUILD}/.config
+endif
 	$(SED) 's^.*\(CROSS_COMPILER_PREFIX\).*^\1=\"$(TARGET_CROSS)\"^' ${WRKBUILD}/.config
 ifeq ($(ADK_TARGET_ENDIAN),little)
 	$(SED) 's/.*\(ARCH_LITTLE_ENDIAN\).*/\1=y/' ${WRKBUILD}/.config
@@ -80,6 +85,13 @@ ifeq ($(ADK_TARGET_HARD_FLOAT_DP),y)
 	$(SED) 's/.*\(UCLIBC_HAS_FPU\).*/\1=y/' ${WRKBUILD}/.config
 	$(SED) 's/.*\(UCLIBC_HAS_SOFT_FLOAT\).*/# \1 is not set/' ${WRKBUILD}/.config
 endif
+ifeq ($(ADK_TARGET_BINFMT_ELF),y)
+	$(SED) 's/.*\(UCLIBC_FORMAT_ELF\).*/\1=y/' ${WRKBUILD}/.config
+	$(SED) 's/.*\(UCLIBC_FORMAT_FDPIC_ELF\).*/# \1 is not set/' ${WRKBUILD}/.config
+	$(SED) 's/.*\(UCLIBC_FORMAT_FLAT\).*/# \1 is not set/' ${WRKBUILD}/.config
+	$(SED) 's/.*\(UCLIBC_FORMAT_FLAT_SEP_DATA\).*/# \1 is not set/' ${WRKBUILD}/.config
+	$(SED) 's/.*\(UCLIBC_FORMAT_SHARED_FLAT\).*/# \1 is not set/' ${WRKBUILD}/.config
+endif
 ifeq ($(ADK_TARGET_BINFMT_FDPIC),y)
 	$(SED) 's/.*\(UCLIBC_FORMAT_FDPIC_ELF\).*/\1=y/' ${WRKBUILD}/.config
 	$(SED) 's/.*\(UCLIBC_FORMAT_ELF\).*/# \1 is not set/' ${WRKBUILD}/.config
@@ -376,6 +388,8 @@ $(WRKBUILD)/.installed: $(WRKBUILD)/.compiled
 		UCLIBC_EXTRA_LDFLAGS="$(TARGET_LDFLAGS)" \
 		VERBOSE=1 \
 		install_runtime install_dev
+	ln -f ${STAGING_TARGET_DIR}/usr/lib/crt1.o \
+		${STAGING_TARGET_DIR}/usr/lib/Scrt1.o
 ifeq ($(ADK_TARGET_LIBC_UTILS),y)
 	PATH='$(HOST_PATH)' $(MAKE) -C $(WRKBUILD) \
 		ARCH="$(ADK_TARGET_ARCH)" \
-- 
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