Mike Frysinger wrote:
On Friday 18 May 2007, Yann E. MORIN wrote:
So, to build a cross-toolchain with uClibc, we need, in order:
no
the only header that gets generated is bits/sysnum.h and the only thing that
uses that is syscall.h ... which gcc doesnt use, so it isnt really too much
of an issue ...
Hi Mike,
I'd like to come back to this issue because I've fallen in the same
problem while trying to build from scratch
a cross gcc (for SH4).
Currently the 'headers' target cannot be used for the reason that it
tries to compile something with a HOST compiler
using CPU_FLAGS (the same issue Yann Morin reported)
According to Paul Brook suggestion to split the 'headers' target on
Makefile, and following your note about the pointless
generation of sysnum.h for the gcc build purpose,
I'd like to suggest a fix into uClibc/Makefile.in that consist into
splitting the 'headers' target into three parts:
headers-sysnum -> producing the sysnum.h
headers: creating the symlinks from include/sys include/bits to the arch
specific header files -> This used to build gcc bootstrap
headers-extra: any other headers target (i.e. locale)
To have a uclibc-bootstrap headers just we can use (after configuring
the uClibc)
make headers
make PREFIX=<wherever you like> install_headers
My patch is just for reference because it includes also the nptl part.
If it is ok, I can do a cleanup a post a new one synchronized with trunk.
so the normal order is fine:
- build/install binutils
- install uClibc headers
- install kernel headers
- build C-only gcc
- build/install uClibc
- build C/C++/whatever gcc
glibc is the same way
I had a look at the glibc and I noted that during the install-headers
stage, glibc use the host gcc without
passing any of arch specific flags (it uses the asm_CPP macro), this is
why it doesn't fail.
-mike
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--- uClibc-nptl-svn_r17694/Makefile.in 2007-02-16 11:50:47.669900000 +0100
+++ uClibc-nptl/Makefile.in 2007-07-10 12:07:47.514867000 +0200
@@ -53,6 +53,21 @@ endif
HEADERS_BITS_COMMON := $(notdir $(wildcard
$(top_srcdir)libc/sysdeps/linux/common/bits/*.h))
HEADERS_BITS_ARCH := $(notdir $(wildcard
$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)/bits/*.h))
HEADERS_BITS_COMMON := $(filter-out
$(HEADERS_BITS_ARCH),$(HEADERS_BITS_COMMON))
+
+headers-sysnum: include/bits/sysnum.h
+ $(Q)\
+ set -e; \
+ cd $(top_builddir); \
+ tmp=`mktemp include/bits/sysnum.h.XXXXXX 2>/dev/null`; \
+ [ -z "$$tmp" ] && tmp='include/bits/sysnum.h.new'; \
+ KERNEL_HEADERS="${KERNEL_HEADERS}" top_builddir=. CC="$(CC)
$(CPU_CFLAGS)" $(SHELL) extra/scripts/gen_bits_syscall_h.sh > $$tmp; \
+ if cmp include/bits/sysnum.h $$tmp >/dev/null 2>&1; then \
+ $(RM) $$tmp; \
+ else \
+ mv -f $$tmp include/bits/sysnum.h; \
+ fi
+
+
headers: include/bits/uClibc_config.h
$(Q)$(MAKE) headers-y
$(Q)\
@@ -85,29 +100,24 @@ headers: include/bits/uClibc_config.h
$(LN) -fs $$i .; \
done; \
fi
- $(Q)\
- set -e; \
- cd $(top_builddir); \
- tmp=`mktemp include/bits/sysnum.h.XXXXXX 2>/dev/null`; \
- [ -z "$$tmp" ] && tmp='include/bits/sysnum.h.new'; \
- KERNEL_HEADERS="${KERNEL_HEADERS}" top_builddir=. CC="$(CC)
$(CPU_CFLAGS)" $(SHELL) extra/scripts/gen_bits_syscall_h.sh > $$tmp; \
- if cmp include/bits/sysnum.h $$tmp >/dev/null 2>&1; then \
- $(RM) $$tmp; \
- else \
- mv -f $$tmp include/bits/sysnum.h; \
- fi
-ifeq ($(UCLIBC_HAS_LOCALE),y)
- $(MAKE) locale_headers
-endif
ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
- $(MAKE) nptl_headers
- ifeq ($(shell $(CC) --help >& /dev/null && echo yes),yes)
- $(MAKE) nptl_arch_headers
- $(MAKE) nptl_linux_headers
- endif
-endif
+ $(MAKE) nptl_headers
+endif
+
+
+headers-extra:
+ ifeq ($(UCLIBC_HAS_LOCALE),y)
+ $(MAKE) locale_headers
+ endif
+ ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
+ $(MAKE) nptl_headers_extra
+ ifeq ($(shell $(CC) --help >& /dev/null && echo yes),yes)
+ $(MAKE) nptl_arch_headers
+ $(MAKE) nptl_linux_headers
+ endif
+ endif
-pregen: headers
+pregen: headers headers-sysnum headers-extra
install: install_runtime install_dev
--- uClibc-nptl-svn_r17694/libpthread/nptl/Makefile.in 2007-02-16
11:50:43.979855000 +0100
+++ uClibc-nptl/libpthread/nptl/Makefile.in 2007-07-10 11:52:22.760601000
+0200
@@ -305,6 +305,8 @@ nptl_headers:
$(LN) -sf
../../$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/bits/pthreadtypes.h
$(top_builddir)include/bits/
$(LN) -sf ../../$(PTDIR)/sysdeps/pthread/bits/libc-lock.h
$(top_builddir)include/bits/
$(LN) -sf ../../$(PTDIR)/sysdeps/pthread/bits/stdio-lock.h
$(top_builddir)include/bits/
+
+nptl_headers_extra:
ifeq ($(shell $(CC) --help >& /dev/null && echo yes),yes)
$(MAKE) $(PTHREAD_OUT)/pthread-errnos.h
endif
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