Escaping the dollar sign in build_rules.txt not possible (Bugzilla Bug 297)

[tianocore-issues]

This issue was created automatically with bugzilla2github

Bugzilla Bug 297

Date: 2016-12-15T01:44:57+00:00
From: peter.kirmeier
To: @BobCF
CC: ye.y.wu

Last updated: 2018-11-05T02:39:48+00:00

[tianocore-issues]

Comment 1170

Date: 2016-12-15 01:44:57 +0000
From: peter.kirmeier

• Industry Specification: ---
• Release Observed: EDK II Master
• Releases to Fix: EDK II Master
• Target OS: ---
• Bugzilla Assignee(s): @BobCF

Using the build_rules.txt to generate makefile commands is not supporting to output the makefile escape sequence "$$". Make uses "$$" to escape the "$" sign, so it will not be parsed as macro/variable. Unfortunately the build tools don't have the possibility to print "$$" into a makefile.

Here an example of such a build_rules.txt modification:
> <Command>
> "$(TOOLS_DIR)\gawk.exe" "NF{gsub(/ *\$$/,&quot;&quot;); print}" infile.in > outfile.out

Here are some more tries to figure out how the $ is processed:

> $() prints $() into the makefile but fails because no macro name is set,
> $($) prints $($) into the makefile but fails because second $ is unknown,
> ${} prints ${} into the makefile but fails because "{" is no valid character,
> $ or $$ or $$$ or $$$$ .. print a single $ into the makefile but fails because next character "/" invalid

Adding the capability of escaping the $ in any way would solve this issue nicely (I prefer).
Preventing cutting down multiple $ signs to a single one should work here, too.

(Related to email "[edk2] $ escape sequence at build_rule.txt": https://lists.01.org/pipermail/edk2-devel/2016-December/005669.html)

[tianocore-issues]

Comment 1195

Date: 2016-12-21 20:04:05 +0000
From: Chris <<ye.y.wu>>

bug scrub: assign to Yonghong

[tianocore-issues]

Comment 5491

Date: 2018-11-05 02:39:48 +0000
From: Yonghong Zhu <<yonghong.zhu>>

change to Bob