在64位Ubuntu-12.04下编译LinSched 3.3会引发以下错误:
******/home/xxxxx/Desktop/linsched_3.3/tools/linsched/tests/linsched_rand_test.c:169: undefined reference to `sqrt'
collect2: ld returned 1 exit status
make[1]: [linsched_rand_test] Error 1
make[1]: Leaving directory `/home/jianguo/Desktop/linsched_3.3/tools/linsched/tests'
make: [all] Error 2*
在引用/链接到math.h时似乎存在问题,即:
数学:/usr/include/math.h
从LinSched 3.3的make文件中,CFLAGS和LFLAGS定义如下,
CC = ${CROSS_COMPILE}gcc
CFLAGS = -g -O2 -m64 -D__KERNEL__ -D__LINSCHED__ -Wall -Wundef -Wstrict-prototypes \
-Werror-implicit-function-declaration -fno-common \
-I${LINSCHED_DIR}/include -I${LINUXDIR}/include \
-I${LINUXDIR}/arch/linsched/include -I${LINSCHED_DIR}/ \
-include ${LINSCHED_DIR}/include/generated/autoconf.h \
-Wno-pointer-sign -include ${LINUXDIR}/include/linux/kconfig.h
CFLAGS_LINUX = $(CFLAGS) -nostdinc -isystem $(shell $(CC) -print-file-name=include) \
-include ${LINSCHED_DIR}/linux_linsched.h \
-Wno-unused -Wno-strict-aliasing
LFLAGS = -lm
....
...
...
LD_PERCPU = ${LD} -r -T ${LINSCHED_DIR}/linsched.lds
OBJ_FILES = ${LINSCHED_OBJS} ${LINUX_OBJS}
DEPS := ${OBJ_FILES:.o=.d}
-include ${DEPS}
TIME_HDR=${LINUXDIR}/kernel/timeconst.h
${TIME_HDR}: ${LINUXDIR}/kernel/timeconst.pl
@echo "(Generating timeconst.h)"
@perl ${LINUXDIR}/kernel/timeconst.pl 1000 > $@
${LINUX_OBJS}: %.o: %.c ${TIME_HDR}
@echo "CC KERNEL $<"
@${CC} -o $@ ${CFLAGS_LINUX} -c $< -MMD
%.o: %.c
@echo "CC SIM $<"
@${CC} ${CFLAGS} -o $@ -c $< -MMD
网络上有人建议将-lm
添加到CFLAGS中,我尝试将-lm
参数插入到CFLAGS的多个位置,但同样的错误仍然存在。
任何想法???
BTW,我在64位ubuntu下编译了LinSched 3.3,因为在CFLAGS中它被配置为-m64。而在32位Ubuntu下的前编译会引发数据不兼容的错误(在elf64-x86-64和elf32-i386之间)
正如@ another.anon.coward所建议的,我检查了LFLAG如何在以后使用,并发现它是使用的vever。作为解决方案,我应该如何修改makefile以添加LFLAGS参数???
答案 0 :(得分:0)
实际上问题是链接标志$ {LFLAGS}在/ tools / linsched / tests / Makefile中使用不正确。
以下是修补linsched:
的数学库链接相关构建问题的补丁git harddeploy