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authorBoris Kolpackov <boris@codesynthesis.com>2022-07-27 12:58:59 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2022-07-27 12:58:59 +0200
commit6733a910f44815aec9479f1b810818a96e9afb82 (patch)
treef4bd07cd108cb64c88612116bbe93de7edd86c66
parentddf1d0b2b2399a96dcebe7d3a37cef9b36284f11 (diff)
Update NEWS file some more
-rw-r--r--NEWS40
1 files changed, 35 insertions, 5 deletions
diff --git a/NEWS b/NEWS
index d87f24e..0467910 100644
--- a/NEWS
+++ b/NEWS
@@ -129,7 +129,7 @@ Version 0.15.0
coptions = $cc.coptions $cxx.coptions
depdb dyndep $poptions --what=header --default-type=h -- \
- $cxx.path $poptions $coptions $cxx.mode -M -MG $s
+ $cxx.path $poptions $coptions $cxx.mode -M -MG $s
diag c++ ($<[0])
@@ -140,7 +140,7 @@ Version 0.15.0
t = $(o).t
depdb dyndep $poptions --what=header --default-type=h --file $t -- \
- $cxx.path $poptions $coptions $cxx.mode -M -MG $s >$t
+ $cxx.path $poptions $coptions $cxx.mode -M -MG $s >$t
The above depdb-dyndep commands will run the C++ compiler with the -M -MG
options to extract the header dependency information, parse the resulting
@@ -231,19 +231,49 @@ Version 0.15.0
s = $path($<[0])
o = $path($>)
- poptions = $cxx.poptions $cc.poptions
- poptions += $cxx.lib_poptions(libue{hello-meta}, obje)
+ lib_poptions = $cxx.lib_poptions(libue{hello-meta}, obje)
+ depdb hash $lib_poptions
+
+ poptions = $cxx.poptions $cc.poptions $lib_poptions
coptions = $cc.coptions $cxx.coptions
depdb dyndep $poptions --what=header --default-type=h \
--update-exclude libue{hello-meta} -- \
- $cxx.path $poptions $coptions $cxx.mode -M -MG $s
+ $cxx.path $poptions $coptions $cxx.mode -M -MG $s
diag c++ ($<[0])
$cxx.path $poptions $coptions $cxx.mode -o $o -c $s
}}
+ As another example, sometimes we need to extract the "common interface"
+ preprocessor options that are independent of the the library type (static
+ or shared). For example, the Qt moc compiler needs to "see" the C/C++
+ preprocessor options from imported libraries if they could affect its
+ input. Here is how we can implement this:
+
+ import libs = libhello%lib{hello}
+
+ libul{hello-meta}: $libs
+
+ cxx{hello-moc}: hxx{hello} libul{hello-meta} $moc
+ {{
+ s = $path($<[0])
+ o = $path($>[0])
+ t = $(o).t
+
+ lib_poptions = $cxx.lib_poptions(libul{hello-meta})
+ depdb hash $lib_poptions
+
+ depdb dyndep --byproduct --drop-cycles --what=header --default-type=h \
+ --update-exclude libul{hello-meta} --file $t
+
+ diag moc ($<[0])
+
+ $moc $cc.poptions $cxx.poptions $lib_poptions \
+ -f $leaf($s) --output-dep-file --dep-file-path $t -o $o $s
+ }}
+
Planned future improvements include support for the `lines` (list of
files, one per line) input format in addition to `make` and support for
dynamic targets in addition to prerequisites.