The behaviour of echo for arguments containing the two-character
substring `\0` varies among implementations: in coreutils echo,
and in the builtins of ash, bash, busybox sh, csh, and fish, the two
characters `\0` are emitted literally; the builtins of tcsh and zsh
emit a null character and continue rendering the rest of the string;
dash's builtin terminates the string early.
Ubuntu since 6.10 uses dash as /bin/sh, so on such systems,
configure misdiagnoses the assembler as unable to optimize eh_frame
sections correctly, yielding ultimately an unnecessary use of
`--traditional-format` in the driver's invocation of the assembler.
diff -ru gcc-4.2.1-orig/gcc/configure gcc-4.2.1/gcc/configure
--- gcc-4.2.1-orig/gcc/configure 2007-01-01 22:44:31.000000000 -0500
+++ gcc-4.2.1/gcc/configure 2017-09-19 06:50:48.546060400 -0400
@@ -14076,7 +14076,8 @@
.LSCIE1:
.4byte 0x0
.byte 0x1
- .ascii "z\0"
+ .ascii "z"
+ .byte 0x0
.byte 0x1
.byte 0x78
.byte 0x1a
