Daniel P. Berrangé fdd941eeb2 build: workaround behaviour regression in gnu make 4.3 ... We need the "$(space)" variable to contain a single whitespace character. We do this by assigning and then appending an empty string to the variable. Variable appends get separated by a single whitespace historically, but GNU make 4.3 introduced a behaviour regression. https://lists.gnu.org/archive/html/bug-make/2020-01/msg00057.html [quote] * WARNING: Backward-incompatibility! Previously appending using '+=' to an empty variable would result in a value starting with a space. Now the initial space is only added if the variable already contains some value. Similarly, appending an empty string does not add a trailing space. [/quote] This patch tries a new trick to get a single whitespace by getting make to expand two non-existant variables separated by a space. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>		2020-03-16 12:07:21 +00:00
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check-spacing.pl	Remove all Author(s): lines from source file headers	2018-12-13 16:08:38 +00:00
syntax-check.mk	build: workaround behaviour regression in gnu make 4.3	2020-03-16 12:07:21 +00:00
useless-if-before-free	build: import gnulib's syntax-check make rules	2019-10-09 13:36:29 +01:00
vc-list-files	build: import gnulib's syntax-check make rules	2019-10-09 13:36:29 +01:00