Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 103 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/i386/Makefile b/REORG.TODO/sysdeps/i386/Makefile
new file mode 100644
index 0000000000..e30e1339f0
--- /dev/null
+++ b/REORG.TODO/sysdeps/i386/Makefile
@@ -0,0 +1,103 @@
+# The mpn functions need a #define for asm syntax flavor.
+# Every i386 port in use uses gas syntax (I think).
+asm-CPPFLAGS += -DGAS_SYNTAX
+
+# The i386 `long double' is a distinct type we support.
+long-double-fcts = yes
+
+ifeq ($(subdir),string)
+sysdep_routines += cacheinfo
+endif
+
+ifeq ($(subdir),gmon)
+sysdep_routines += i386-mcount
+endif
+
+ifeq ($(subdir),elf)
+CFLAGS-rtld.c += -Wno-uninitialized -Wno-unused
+CFLAGS-dl-load.c += -Wno-unused
+CFLAGS-dl-reloc.c += -Wno-unused
+endif
+
+ifeq ($(subdir),debug)
+CFLAGS-backtrace.c += -fexceptions
+endif
+
+# Most of the glibc routines don't ever call user defined callbacks
+# nor use any FPU or SSE* and as such don't need bigger %esp alignment
+# than 4 bytes.
+# Lots of routines in math will use FPU, so make math subdir an exception
+# here.
+# In gcc 4.6 (and maybe earlier?) giving -mpreferred-stack-boundary=2 is
+# an error, so don't try to reduce it here like we used to.  We still
+# explicit set -mpreferred-stack-boundary=4 the places where it matters,
+# in case an older compiler defaulted to 2.
+ifeq ($(subdir),math)
+sysdep-CFLAGS += -mpreferred-stack-boundary=4
+else
+ifeq ($(subdir),csu)
+sysdep-CFLAGS += -mpreferred-stack-boundary=4
+gen-as-const-headers += link-defines.sym
+else
+# Likewise, any function which calls user callbacks
+uses-callbacks += -mpreferred-stack-boundary=4
+# Likewise, any stack alignment tests
+stack-align-test-flags += -malign-double -mpreferred-stack-boundary=4
+endif
+endif
+
+# And a couple of other routines
+ifeq ($(subdir),stdlib)
+CFLAGS-exit.c += -mpreferred-stack-boundary=4
+CFLAGS-cxa_finalize.c += -mpreferred-stack-boundary=4
+endif
+ifeq ($(subdir),elf)
+CFLAGS-dl-init.c += -mpreferred-stack-boundary=4
+CFLAGS-dl-fini.c += -mpreferred-stack-boundary=4
+CFLAGS-dl-open.c += -mpreferred-stack-boundary=4
+CFLAGS-dl-close.c += -mpreferred-stack-boundary=4
+CFLAGS-dl-error.c += -mpreferred-stack-boundary=4
+endif
+ifeq ($(subdir),dlfcn)
+CFLAGS-dlopen.c += -mpreferred-stack-boundary=4
+CFLAGS-dlopenold.c += -mpreferred-stack-boundary=4
+CFLAGS-dlclose.c += -mpreferred-stack-boundary=4
+CFLAGS-dlerror.c += -mpreferred-stack-boundary=4
+endif
+
+ifneq (,$(filter -mno-tls-direct-seg-refs,$(CFLAGS)))
+defines += -DNO_TLS_DIRECT_SEG_REFS
+endif
+
+ifeq ($(subdir),elf)
+sysdep-dl-routines += tlsdesc dl-tlsdesc
+
+tests += tst-audit3
+modules-names += tst-auditmod3a tst-auditmod3b
+
+$(objpfx)tst-audit3: $(objpfx)tst-auditmod3a.so
+$(objpfx)tst-audit3.out: $(objpfx)tst-auditmod3b.so
+tst-audit3-ENV = LD_AUDIT=$(objpfx)tst-auditmod3b.so
+endif
+
+ifeq ($(subdir),csu)
+gen-as-const-headers += tlsdesc.sym
+endif
+
+# Make sure no code in ld.so uses mm/xmm/ymm/zmm registers on i386 since
+# the first 3 mm/xmm/ymm/zmm registers are used to pass vector parameters
+# which must be preserved.
+# With SSE disabled, ensure -fpmath is not set to use sse either.
+rtld-CFLAGS += -mno-sse -mno-mmx -mfpmath=387
+ifeq ($(subdir),elf)
+CFLAGS-.os += $(if $(filter $(@F),$(patsubst %,%.os,$(all-rtld-routines))),\
+		   $(rtld-CFLAGS))
+
+tests-special += $(objpfx)tst-ld-sse-use.out
+$(objpfx)tst-ld-sse-use.out: ../sysdeps/i386/tst-ld-sse-use.sh $(objpfx)ld.so
+	@echo "Checking ld.so for SSE register use.  This will take a few seconds..."
+	$(BASH) $< $(objpfx) '$(NM)' '$(OBJDUMP)' '$(READELF)' > $@; \
+	$(evaluate-test)
+else
+CFLAGS-.os += $(if $(filter rtld-%.os,$(@F)), $(rtld-CFLAGS))
+endif