diff options
| author | Eelco Dolstra <edolstra@gmail.com> | 2018-08-17 12:59:23 +0200 |
|---|---|---|
| committer | Eelco Dolstra <edolstra@gmail.com> | 2018-08-17 12:59:23 +0200 |
| commit | d277442df53a01343ba7c1df0bbd2a294058dcba (patch) | |
| tree | 0c4df7b947be75b89d4a9fdc4f756d67b318b471 /src | |
| parent | 19265ed26c5bd25b299896ed851bda6c444cf1a8 (diff) | |
Fix parser/lexer generation with parallel make
Fun fact: rules with multiple targets don't work properly with 'make
-j'. For example, a rule like
a b: c
touch a b
is equivalent to
a: c
touch a b
b: c
touch a b
so with 'make -j', the 'touch' command will be run twice. See
e.g. https://stackoverflow.com/questions/2973445/gnu-makefile-rule-generating-a-few-targets-from-a-single-source-file.
Diffstat (limited to 'src')
| -rw-r--r-- | src/libexpr/local.mk | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/libexpr/local.mk b/src/libexpr/local.mk index daa3258f0..78c8b0dea 100644 --- a/src/libexpr/local.mk +++ b/src/libexpr/local.mk @@ -20,10 +20,14 @@ libexpr_LDFLAGS_PROPAGATED = $(BDW_GC_LIBS) libexpr_ORDER_AFTER := $(d)/parser-tab.cc $(d)/parser-tab.hh $(d)/lexer-tab.cc $(d)/lexer-tab.hh -$(d)/parser-tab.cc $(d)/parser-tab.hh: $(d)/parser.y +$(d)/parser-tab.hh: $(d)/parser-tab.cc + +$(d)/parser-tab.cc: $(d)/parser.y $(trace-gen) bison -v -o $(libexpr_DIR)/parser-tab.cc $< -d -$(d)/lexer-tab.cc $(d)/lexer-tab.hh: $(d)/lexer.l +$(d)/lexer-tab.hh: $(d)/lexer-tab.cc + +$(d)/lexer-tab.cc: $(d)/lexer.l $(trace-gen) flex --outfile $(libexpr_DIR)/lexer-tab.cc --header-file=$(libexpr_DIR)/lexer-tab.hh $< clean-files += $(d)/parser-tab.cc $(d)/parser-tab.hh $(d)/lexer-tab.cc $(d)/lexer-tab.hh |