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-rw-r--r--Makefile.in40
-rw-r--r--README.md10
-rwxr-xr-xconfigure17
-rw-r--r--configure.ac10
4 files changed, 67 insertions, 10 deletions
diff --git a/Makefile.in b/Makefile.in
index c849d77..daab494 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -119,8 +119,14 @@ MUSL_CC_FOR_TARGET ?= $(MUSL_TUPLE)-gcc
MUSL_CXX_FOR_TARGET ?= $(MUSL_TUPLE)-g++
CONFIGURE_HOST = @configure_host@
+PREPARATION_STAMP:=stamps/check-write-permission
all: @default_target@
+ifeq (@enable_host_gcc@,--enable-host-gcc)
+PREPARATION_STAMP+= stamps/install-host-gcc
+PATH := $(builddir)/install-host-gcc/bin:$(PATH)
+GCC_CHECKING_FLAGS := $(GCC_CHECKING_FLAGS) --enable-werror-always
+endif
newlib: stamps/build-gcc-newlib-stage2
linux: stamps/build-gcc-linux-stage2
ifneq (,$(findstring riscv32,$(MUSL_TUPLE)))
@@ -324,11 +330,25 @@ $(srcdir)/%/.git:
flock `git rev-parse --git-dir`/config git submodule init $(dir $@) && \
flock `git rev-parse --git-dir`/config git submodule update $(dir $@)
+stamps/install-host-gcc: $(GCC_SRCDIR) $(GCC_SRC_GIT)
+ if test -f $</contrib/download_prerequisites && test "@NEED_GCC_EXTERNAL_LIBRARIES@" = "true"; then cd $< && ./contrib/download_prerequisites; fi
+ rm -rf $@ $(notdir $@)
+ mkdir $(notdir $@)
+ cd $(notdir $@) && $</configure \
+ --prefix=$(builddir)/install-host-gcc \
+ @with_system_zlib@ \
+ --enable-languages=c,c++ \
+ --disable-bootstrap \
+ --disable-multilib
+ $(MAKE) -C $(notdir $@)
+ $(MAKE) -C $(notdir $@) install
+ mkdir -p $(dir $@) && touch $@
+
#
# GLIBC
#
-stamps/build-binutils-linux: $(BINUTILS_SRCDIR) $(BINUTILS_SRC_GIT) stamps/check-write-permission
+stamps/build-binutils-linux: $(BINUTILS_SRCDIR) $(BINUTILS_SRC_GIT) $(PREPARATION_STAMP)
rm -rf $@ $(notdir $@)
mkdir $(notdir $@)
# CC_FOR_TARGET is required for the ld testsuite.
@@ -351,7 +371,7 @@ stamps/build-binutils-linux: $(BINUTILS_SRCDIR) $(BINUTILS_SRC_GIT) stamps/check
$(MAKE) -C $(notdir $@) install
mkdir -p $(dir $@) && touch $@
-stamps/build-gdb-linux: $(GDB_SRCDIR) $(GDB_SRC_GIT)
+stamps/build-gdb-linux: $(GDB_SRCDIR) $(GDB_SRC_GIT) $(PREPARATION_STAMP)
rm -rf $@ $(notdir $@)
mkdir $(notdir $@)
# CC_FOR_TARGET is required for the ld testsuite.
@@ -498,7 +518,7 @@ stamps/build-gcc-linux-stage2: $(GCC_SRCDIR) $(GCC_SRC_GIT) $(addprefix stamps/b
cp -a $(INSTALL_DIR)/$(LINUX_TUPLE)/lib* $(SYSROOT)
mkdir -p $(dir $@) && touch $@
-stamps/build-binutils-linux-native: $(BINUTILS_SRCDIR) $(BINUTILS_SRC_GIT) stamps/build-gcc-linux-stage2 stamps/check-write-permission
+stamps/build-binutils-linux-native: $(BINUTILS_SRCDIR) $(BINUTILS_SRC_GIT) stamps/build-gcc-linux-stage2 $(PREPARATION_STAMP)
rm -rf $@ $(notdir $@)
mkdir $(notdir $@)
cd $(notdir $@) && $</configure \
@@ -555,7 +575,7 @@ stamps/build-gcc-linux-native: $(GCC_SRCDIR) $(GCC_SRC_GIT) stamps/build-gcc-lin
# NEWLIB
#
-stamps/build-binutils-newlib: $(BINUTILS_SRCDIR) $(BINUTILS_SRC_GIT) stamps/check-write-permission
+stamps/build-binutils-newlib: $(BINUTILS_SRCDIR) $(BINUTILS_SRC_GIT) $(PREPARATION_STAMP)
rm -rf $@ $(notdir $@)
mkdir $(notdir $@)
# CC_FOR_TARGET is required for the ld testsuite.
@@ -575,7 +595,7 @@ stamps/build-binutils-newlib: $(BINUTILS_SRCDIR) $(BINUTILS_SRC_GIT) stamps/chec
$(MAKE) -C $(notdir $@) install
mkdir -p $(dir $@) && touch $@
-stamps/build-gdb-newlib: $(GDB_SRCDIR) $(GDB_SRC_GIT)
+stamps/build-gdb-newlib: $(GDB_SRCDIR) $(GDB_SRC_GIT) $(PREPARATION_STAMP)
rm -rf $@ $(notdir $@)
mkdir $(notdir $@)
# CC_FOR_TARGET is required for the ld testsuite.
@@ -741,7 +761,7 @@ stamps/build-gcc-newlib-stage2: $(GCC_SRCDIR) $(GCC_SRC_GIT) stamps/build-newlib
# MUSL
#
-stamps/build-binutils-musl: $(BINUTILS_SRCDIR) $(BINUTILS_SRC_GIT) stamps/check-write-permission
+stamps/build-binutils-musl: $(BINUTILS_SRCDIR) $(BINUTILS_SRC_GIT) $(PREPARATION_STAMP)
rm -rf $@ $(notdir $@)
mkdir $(notdir $@)
# CC_FOR_TARGET is required for the ld testsuite.
@@ -870,7 +890,7 @@ stamps/build-gcc-musl-stage2: $(GCC_SRCDIR) $(GCC_SRC_GIT) stamps/build-musl-lin
cp -a $(INSTALL_DIR)/$(MUSL_TUPLE)/lib* $(SYSROOT)
mkdir -p $(dir $@) && touch $@
-stamps/build-spike: $(SPIKE_SRCDIR) $(SPIKE_SRC_GIT)
+stamps/build-spike: $(SPIKE_SRCDIR) $(SPIKE_SRC_GIT) $(PREPARATION_STAMP)
rm -rf $@ $(notdir $@)
mkdir $(notdir $@)
cd $(notdir $@) && $</configure \
@@ -906,7 +926,7 @@ stamps/build-pk64: $(PK_SRCDIR) $(PK_SRC_GIT) stamps/build-gcc-newlib-stage2
mkdir -p $(dir $@)
date > $@
-stamps/build-qemu: $(QEMU_SRCDIR) $(QEMU_SRC_GIT)
+stamps/build-qemu: $(QEMU_SRCDIR) $(QEMU_SRC_GIT) $(PREPARATION_STAMP)
rm -rf $@ $(notdir $@)
mkdir $(notdir $@)
cd $(notdir $@) && $</configure \
@@ -971,7 +991,7 @@ stamps/build-llvm-newlib: $(LLVM_SRCDIR) $(LLVM_SRC_GIT) stamps/build-gcc-newlib
ln -s -f clang++ $(NEWLIB_TUPLE)-clang++
mkdir -p $(dir $@) && touch $@
-stamps/build-dejagnu: $(DEJAGNU_SRCDIR) $(DEJAGNU_SRC_GIT)
+stamps/build-dejagnu: $(DEJAGNU_SRCDIR) $(DEJAGNU_SRC_GIT) $(PREPARATION_STAMP)
rm -rf $@ $(notdir $@)
mkdir $(notdir $@)
cd $(notdir $@) && $</configure \
@@ -1101,7 +1121,7 @@ report-binutils-linux: stamps/check-binutils-linux
`find build-binutils-linux/ -name *.sum |paste -sd "," -`
clean:
- rm -rf build-* stamps install-newlib-nano
+ rm -rf build-* install-* stamps install-newlib-nano
.PHONY: report-gdb-newlib report-gdb-newlib-nano
report-gdb-newlib: stamps/check-gdb-newlib
diff --git a/README.md b/README.md
index 7aab3c1..c306338 100644
--- a/README.md
+++ b/README.md
@@ -447,3 +447,13 @@ Here is the list of configure option for specify source tree:
--with-pk-src
--with-qemu-src
--with-spike-src
+
+#### Build host GCC to check for compiler warnings
+
+GCC contributions have to meet several requirements to qualify for upstream
+inclusion. Warning free compilation with a compiler build from the same
+sources is among them. The flag `--enable-host-gcc` does exaclty that:
+
+* Initially a host GCC will be built
+* This host GCC is then used to build the cross compiler
+* The cross compiler will be built with `-Werror` to identify code issues
diff --git a/configure b/configure
index e36b214..36e3e20 100755
--- a/configure
+++ b/configure
@@ -598,6 +598,7 @@ with_glibc_src
with_newlib_src
with_binutils_src
with_gcc_src
+enable_host_gcc
enable_llvm
enable_gdb
with_guile
@@ -697,6 +698,7 @@ with_system_zlib
with_guile
enable_gdb
enable_llvm
+enable_host_gcc
with_gcc_src
with_binutils_src
with_newlib_src
@@ -1340,6 +1342,7 @@ Optional Features:
[--disable-gcc-checking]
--disable-gdb Don't build GDB, as it's not upstream
--enable-llvm Build LLVM (clang)
+ --enable-host-gcc Build host GCC to build cross toolchain
--enable-libsanitizer Build libsanitizer, which only supports rv64
--enable-qemu-system Build qemu with system-mode emulation
@@ -3623,6 +3626,20 @@ else
fi
+# Check whether --enable-host-gcc was given.
+if test "${enable_host_gcc+set}" = set; then :
+ enableval=$enable_host_gcc; enable_host_gcc=yes
+fi
+
+
+if test "x$enable_host_gcc" != xyes; then :
+ enable_host_gcc=--disable-host-gcc
+
+else
+ enable_host_gcc=--enable-host-gcc
+
+fi
+
{
diff --git a/configure.ac b/configure.ac
index 1756fde..68b6b31 100644
--- a/configure.ac
+++ b/configure.ac
@@ -259,6 +259,16 @@ AS_IF([test "x$enable_llvm" != xyes],
[AC_SUBST(enable_llvm, --disable-llvm)],
[AC_SUBST(enable_llvm, --enable-llvm)])
+AC_ARG_ENABLE(host_gcc,
+ [AS_HELP_STRING([--enable-host-gcc],
+ [Build host GCC to build cross toolchain])],
+ [enable_host_gcc=yes],
+ [])
+
+AS_IF([test "x$enable_host_gcc" != xyes],
+ [AC_SUBST(enable_host_gcc, --disable-host-gcc)],
+ [AC_SUBST(enable_host_gcc, --enable-host-gcc)])
+
AC_DEFUN([AX_ARG_WITH_SRC],
[{m4_pushdef([opt_name], with_$1_src)
AC_ARG_WITH($1-src,
generated by cgit v1.1 at 2024-06-29 01:03:16 +0000