Re: port-mips/57680: printf("%.1f") shows wrongresultsonR3000mipseb

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

The following reply was made to PR port-mips/57680; it has been noted by GNATS.

From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
To: rvp%SDF.ORG@localhost
Cc: gnats-bugs%netbsd.org@localhost, tsutsui%ceres.dti.ne.jp@localhost
Subject: Re: port-mips/57680: printf("%.1f") shows wrongresultsonR3000mipseb
Date: Sun, 5 Nov 2023 15:49:46 +0900

 I wrote:
 
 > I'll try to check which function actually requires -O0 later.
 > (a bit boring work on the slow machine..)
 
 Building dtoa.c with -O0 works around:
 
 (on build host)
 ---
 % /s/netbsd-9/src/obj.newsmips/tooldir.NetBSD-10.0_BETA-i386/bin/nbmake-newsmips -j4 DBG=-O0 libc.so.12.213
 --- dtoa.pico ---
 #   compile  libc/dtoa.pico
 /s/netbsd-9/src/obj.newsmips/tooldir.NetBSD-10.0_BETA-i386/bin/mipseb--netbsd-gcc \
 -O0   -std=gnu99    -Wall -Wstrict-prototypes -Wmissing-prototypes \
 -Wpointer-arith -Wno-sign-compare  -Wsystem-headers   -Wno-traditional   \
 -Wa,--fatal-warnings  -Wreturn-type -Wswitch -Wshadow -Wcast-qual \
 -Wwrite-strings -Wextra -Wno-unused-parameter -Wno-sign-compare \
 -Wold-style-definition -Wsign-compare -Wformat=2  -Wno-format-zero-length  \
 -Werror   -fPIE    --sysroot=/s/netbsd-9/src/obj.newsmips/destdir.newsmips \
 -D_LIBC -DLIBC_SCCS -DSYSLIBC_SCCS -D_REENTRANT -DHESIOD -DINET6 -DNLS -DYP \
 -I/s/netbsd-9/src/lib/libc/include -I/s/netbsd-9/src/lib/libc -I. \
 -I/s/netbsd-9/src/sys -I/s/netbsd-9/src/lib/libc/compat/../locale \
 -I/s/netbsd-9/src/lib/libc/compat/stdlib -I/s/netbsd-9/src/lib/libc/compat/../stdlib \
 -D__BUILD_LEGACY -D__HAVE_ASM_ATOMIC_CAS_UP -I/s/netbsd-9/src/lib/libc/../../common/lib/libc/quad \
 -I/s/netbsd-9/src/lib/libc/../../common/lib/libc/string \
 -I/s/netbsd-9/src/lib/libc/../../common/lib/libc/arch/mips/string \
 -D__DBINTERFACE_PRIVATE -I/s/netbsd-9/src/libexec/ld.elf_so \
 -I/s/netbsd-9/src/lib/libc/dlfcn -I/s/netbsd-9/src/lib/libc/gdtoa \
 -I/s/netbsd-9/src/lib/libc/locale -DHonor_FLT_ROUNDS \
 -I/s/netbsd-9/src/lib/libc/arch/mips/gdtoa -DWITH_RUNE \
 -I/s/netbsd-9/src/lib/libc -DPOSIX_MISTAKE -DCOMPAT__RES -DUSE_POLL \
 -DPORTMAP -DWIDE_DOUBLE -DUSG_COMPAT  -c    -D_I18N_DYNAMIC -fPIC   \
 /s/netbsd-9/src/lib/libc/gdtoa/dtoa.c -o dtoa.pico
 /s/netbsd-9/src/obj.newsmips/tooldir.NetBSD-10.0_BETA-i386/bin/mipseb--netbsd-objcopy -x  dtoa.pico
 
  :
 ---
 
 (on NWS-3470 target)
 ---
 news3470-% env LD_LIBRARY_PATH=libc-O2-and-dtoa-O0 ldd ./test
 ./test:
         -lc.12 => libc-O2-and-dtoa-O0/libc.so.12
 news3470-% env LD_LIBRARY_PATH=libc-O2-and-dtoa-O0 ./test
 314.2
 314
 1570.8
 1570
 news3470-% 
 
 ---
 Izumi Tsutsui