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Frighty_KH · 18. Dezember 2009

Hi all!

I try to build a package with a c program that uses libusb by including <usb.h>. Although I added the DEPENDS line and in my bb file and the option -l usb to the compiler call (see below), the compilation failes with "error: usb.h: No such file or directory".

Some hints:

- I can imagine when I built the package at the first time, the dependencies of libusb have been parsed successfully.
- Compiling that program on my Ubuntu machine works perfectly.

Any suggestions from the professionals?

Here is my bb-file:

Code

DESCRIPTION = "Vitalwerterfassung" 
SECTION = "base" 
MAINTAINER = "me 
LICENSE = "GPL" 
PR = "isst.r0" 
DEPENDS += "libusb" 
FILESDIR = "${@os.path.dirname(bb.data.getVar('FILE',d,1))}/vitalwerterfassung" 
SRC_URI = "file://vitalwerterfassung.c" 
do_compile() { 
cp ${WORKDIR}/vitalwerterfassung.c . 
${CC} -lusb -o vitalwerterfassung.out vitalwerterfassung.c 
} 
do_install() { 
install -m 0755 vitalwerterfassung.out ${D}/${bindir}

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edit: Meanwhile I looked into some other Packages that use the c compiler. There is an additional entry ${CFLAGS} ${LDFLAGS}. I changed the corresponding line and now it looks like this:

Code

${CC} ${CFLAGS} ${LDFLAGS} vitalwerterfassung.c -o vitalwerterfassung.out

The error that is produced now looks a little different, but seems to point to the same problem as certain libusb-specific functions can not be found:

Code

/tmp/cc9F79nf.o: In function `ReadData':
vitalwerterfassung.c:(.text+0x138): undefined reference to `usb_control_msg'
/tmp/cc9F79nf.o: In function `SendData':
vitalwerterfassung.c:(.text+0x1d4): undefined reference to `usb_control_msg'
/tmp/cc9F79nf.o: In function `main':
vitalwerterfassung.c:(.text+0x3bc): undefined reference to `usb_init'
vitalwerterfassung.c:(.text+0x3d4): undefined reference to `usb_find_busses'
vitalwerterfassung.c:(.text+0x3ec): undefined reference to `usb_find_devices'
vitalwerterfassung.c:(.text+0x404): undefined reference to `usb_busses'
vitalwerterfassung.c:(.text+0x464): undefined reference to `usb_open'
vitalwerterfassung.c:(.text+0x4c0): undefined reference to `usb_control_msg'
vitalwerterfassung.c:(.text+0x534): undefined reference to `usb_control_msg'
vitalwerterfassung.c:(.text+0x968): undefined reference to `usb_close'
collect2: ld returned 1 exit status

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Frighty_KH · 6. Januar 2010

This bb-File now got compiled. The "-lusb" was missing in the modified version. Thanks for listening

Code

DESCRIPTION = "XXXXXXXX Vitalwerterfassung" 
SECTION = "base" 
MAINTAINER = "XXXXXXXX <XXXXXXXXX>" 
LICENSE = "GPL" 
PR = "isst.r0" 
DEPENDS += "libusb" 
FILESDIR = "${@os.path.dirname(bb.data.getVar('FILE',d,1))}/vitalwerterfassung" 
SRC_URI = "file://vitalwerterfassung.c" 
do_compile() { 
cp ${WORKDIR}/vitalwerterfassung.c . 
${CC} ${CFLAGS} ${LDFLAGS} -lusb vitalwerterfassung.c -o vitalwerterfassung.out 
} 
do_install() { 
install -m 0755 vitalwerterfassung ${D}/${bindir}

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