diff options
Diffstat (limited to 'gcc/config/i860/x-sysv4')
| -rw-r--r-- | gcc/config/i860/x-sysv4 | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/gcc/config/i860/x-sysv4 b/gcc/config/i860/x-sysv4 deleted file mode 100644 index c01fb887dca..00000000000 --- a/gcc/config/i860/x-sysv4 +++ /dev/null @@ -1,44 +0,0 @@ -# The svr4 reference port for the i860 contains an alloca.o routine -# in /usr/ucblib/libucb.a, but we can't just try to get that by -# setting CLIB to /usr/ucblib/libucb.a because (unfortunately) -# there are a lot of other routines in libucb.a which are supposed -# to be the Berkeley versions of library routines normally found in -# libc.a and many of these Berkeley versions are badly broken. Thus, -# if we try to link programs with libucb.a before libc.a, those -# programs tend to crash. - -# Also, the alloca() routine supplied in early version of svr4 for -# the i860 is non-ABI compliant. It doesn't keep the stack aligned -# to a 16-byte boundary as the ABI requires. - -# More importantly however, even a fully ABI compliant alloca() routine -# would fail to work correctly with some versions of the native svr4 C -# compiler currently being distributed for the i860 (as of 1/29/92). -# The problem is that the native C compiler generates non-ABI-compliant -# function epilogues which cut back the stack (upon function exit) in -# an incorrect manner. Specifically, they cut back the stack by adding -# the nominal *static* frame size (determined statically at compile-time) -# to the stack pointer rather than setting the stack pointer based upon -# the current value of the frame pointer (as called for in the i860 ABI). -# This can cause serious trouble in cases where you repeatedly call a -# routine which itself calls alloca(). In such cases, the stack will -# grow continuously until you finally run out of swap space or exceed -# the system's process size limit. To avoid this problem (which can -# arise when a stage1 gcc is being used to build a stage2 gcc) you -# *must* link in the C language version of alloca() which is supplied -# with gcc to your stage1 version of gcc. The following definition -# forces that to happen. - -ALLOCA=alloca.o - -# We build all stages *without* shared libraries because that may make -# debugging the compiler easier (until there is a GDB which supports -# both Dwarf *and* svr4 shared libraries). - -# Note that the native C compiler for the svr4 reference port on the -# i860 recognizes a special -gg option. Using that option causes *full* -# Dwarf debugging information to be generated, whereas using only -g -# causes only limited Dwarf debugging information to be generated. -# (This is an undocumented feature of the native svr4 C compiler.) - -CCLIBFLAGS=-Bstatic -dn -gg |