Symbol reference not detected in ARM assembly file

[Alain Kalker]

(If GNU GLOBAL doesn't support ARM assembly, please ignore.)

OS: Arch Linux (rolling release)
Product: GNU GLOBAL 6.2.7

When browsing the Linux kernel, I found that GNU GLOBAL didn't detect 
references to a preprocessor constant in an ARM assembly (.S) file.

Steps to reproduce:

Get and prepare most recent Linux kernel:
$ git clone https://github.com/torvalds/linux.git
$ cd linux
$ export ARCH=ARM

Generate tags
$ make gtags

Expected result (simulated here by `global -gx`)
$ global -gx TEGRA_FLOW_CTRL_VIRT
TEGRA_FLOW_CTRL_VIRT   63 arch/arm/mach-tegra/sleep-tegra20.S ldr    r3, 
=TEGRA_FLOW_CTRL_VIRT
TEGRA_FLOW_CTRL_VIRT   58 arch/arm/mach-tegra/sleep-tegra30.S ldr    
r12, =TEGRA_FLOW_CTRL_VIRT
TEGRA_FLOW_CTRL_VIRT   24 arch/arm/mach-tegra/sleep.h #define 
TEGRA_FLOW_CTRL_VIRT (TEGRA_FLOW_CTRL_BASE - IO_PPSB_PHYS \

Actual result:
$ global -dx TEGRA_FLOW_CTRL_VIRT
TEGRA_FLOW_CTRL_VIRT   24 arch/arm/mach-tegra/sleep.h #define 
TEGRA_FLOW_CTRL_VIRT (TEGRA_FLOW_CTRL_BASE - IO_PPSB_PHYS \
$ global -rx TEGRA_FLOW_CTRL_VIRT
$ # no result
$ global -sx TEGRA_FLOW_CTRL_VIRT
$ # no result

Kind regards,

Alain Kalker