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Merge #17087: build: Add variable printing target to Makefiles

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181989f6c9427fc266dbdcc84cb60ac03e67cdb2 build: Add variable printing target to Makefiles (Carl Dong)

Pull request description:

  ```
  I kept finding myself needing these to debug our build system, since
  they are innocuous and are very helpful they probably belong in the
  codebase.

  Source: John Graham-Cumming
  https://www.cmcrossroads.com/article/printing-value-makefile-variable
  ```

ACKs for top commit:
  MarcoFalke:
    ACK 181989f6c9427fc266dbdcc84cb60ac03e67cdb2
  fanquake:
    ACK 181989f6c9427fc266dbdcc84cb60ac03e67cdb2 - concise amount of useful code. Tested on macOS. Did not visit the link.

Tree-SHA512: 2139621e68a499c7347663ca9dc04e166ea6280e05986c27858df0156016ef2f9461262464d70c601419384f43a4ae3bcc67dfc0a05dbeef64f08386ab429cd8
This commit is contained in:
fanquake 2019-10-09 17:30:30 -04:00 committed by Pasta
parent 22111c88f6
commit c79a03ec93
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GPG Key ID: 52527BEDABE87984
2 changed files with 8 additions and 0 deletions
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4
Makefile.am
View File

@ -3,6 +3,10 @@
# Distributed under the MIT software license, see the accompanying # Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php. # file COPYING or http://www.opensource.org/licenses/mit-license.php.
# Pattern rule to print variables, e.g. make print-top_srcdir
print-%:
@echo $* = $($*)
ACLOCAL_AMFLAGS = -I build-aux/m4 ACLOCAL_AMFLAGS = -I build-aux/m4
SUBDIRS = src SUBDIRS = src
if ENABLE_MAN if ENABLE_MAN

4
depends/Makefile
View File

@ -1,5 +1,9 @@
.NOTPARALLEL : .NOTPARALLEL :
# Pattern rule to print variables, e.g. make print-top_srcdir
print-%:
@echo $* = $($*)
SOURCES_PATH ?= $(BASEDIR)/sources SOURCES_PATH ?= $(BASEDIR)/sources
WORK_PATH = $(BASEDIR)/work WORK_PATH = $(BASEDIR)/work
BASE_CACHE ?= $(BASEDIR)/built BASE_CACHE ?= $(BASEDIR)/built