linux-stable/tools/usb/Makefile at 831c4c81e8ceba7d34b7fc66da1693bc4b9e7e11 - mirrors/linux-stable - Git - Batts Cloud

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Huang Rui cb292ce222 usb: tools: fix a regression issue that gcc can't link to pthread

Reproduce:
ray@hr-bak:~/usb$ make -C tools/usb/
make: Entering directory `/home/ray/usb/tools/usb'
gcc -Wall -Wextra -g -lpthread -I../include -o testusb testusb.c
/tmp/cc0EMxfy.o: In function `main':
/home/ray/usb/tools/usb/testusb.c:508: undefined reference to `pthread_create'
/home/ray/usb/tools/usb/testusb.c:531: undefined reference to `pthread_join'
collect2: error: ld returned 1 exit status
make: *** [testusb] Error 1
make: Leaving directory `/home/ray/usb/tools/usb'

Comments:
In the latest version (4.7.3) of gcc compiler, it requres that
libraries must follow the object or source files like below:

"gcc hello.c -lpthread" instead of "gcc -lpthread hello.c"

And it isn't encountered at gcc version 4.7.2.
So this patch fix to move the pthread option after testusb.c.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2013-12-04 15:10:54 -08:00

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Makefile

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 # Makefile for USB tools
 CC = $(CROSS_COMPILE)gcc
 PTHREAD_LIBS = -lpthread
 WARNINGS = -Wall -Wextra
 CFLAGS = $(WARNINGS) -g -I../include
 LDFLAGS = $(PTHREAD_LIBS)
 all: testusb ffs-test
 %: %.c
 	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
 clean:
 	$(RM) testusb ffs-test