On Jan 24, 9:29*am, adar wrote:
> I am writing a user space utility which would run on RHEL4, RHEL5 and
> SLES10. *This utility has common source and there are few section of
> code are specific to OS version. In order to differentiate I am
> thinking I could use Linux kernel version. Tha means I need a Linux
> version flag
> 1) at compile time ( in Makefile, in C source )
> 2) at run time *( from c source)
> 3) From rpm spec file to build rpms.
>
> I do not use GNU autotool. Kindly suggest methods. Appreciate your
> help.
> -Adar.


From makefile I'm planning on using uname, for example
OS=$(shell uname -s)
OSVER=$(shell uname -r | ` cut -f1 -d"-"`)
OSARCH=$(shell uname -i)

and then say
ifeq ($(OSVER), 2.6.16)
C_FLAGS = -DLinux_2_6_16
endif

Are there any different methods ?

adar (whoever) schrieb:

> I am writing a user space utility which would run on RHEL4, RHEL5 and
> SLES10. This utility has common source and there are few section of
> code are specific to OS version. In order to differentiate I am
> thinking I could use Linux kernel version. Tha means I need a Linux
> version flag

> 1) at compile time ( in Makefile, in C source )

#include
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
"do something special"
#else
"do some other special things"
#endif

> 2) at run time ( from c source)

man 3 uname, man utsname.h

> 3) From rpm spec file to build rpms.

Should not be necessary if you use options 1) and 2).

Guido


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