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Currently, the target and host flex packages do not behave the same in
terms of patching: the target variant has a patch hook that disables
building the programs (because they are not needed, and do not build
on no-MMU platforms). However, this hook is obviously not executed for
host-flex, because we really want the host flex binary to be built.
In preparation for the introduction of out-of-tree package build, it
is important that we don't do different things in the patch hooks for
the target and host variant of a given package, because the source
tree will be shared between the target and host builds.
To solve this, we introduce a --disable-program configure option,
through a patch to the flex configure.ac and Makefile.am. This patch
makes the current 0001-flex-disable-documentation.patch no longer
needed.
Furthermore, building the documentation is a PITA: flex.1 depends on
configure.ac and a few other files generated during the build. Touching
flex.1 does not work, because automake will forcibly remove the files
when its prerequisites are too old, so pre-requisites of flex.1 will
always be more recent than flex.1. So, we add a patch that adds a
--disable-doc configure option.
Fixes:
http://autobuild.buildroot.org/results/f70/f70b39632535bb9692d0a032166b2f4104532967/
http://autobuild.buildroot.org/results/525/52567afdfe7992b3518de0e01227ba14aa300f21/
[...]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
[yann.morin.1998@free.fr:
- rebase on-top of master,
- add patch to not build the documentation, because simply touching
flex.1 is no longer enough.
- keep install in target/, for shared builds
]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Adrian Perez de Castro <aperez@igalia.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
77 lines
2.2 KiB
Diff
77 lines
2.2 KiB
Diff
From da21733178b34eea303964db5a05e8a3ee4095b4 Mon Sep 17 00:00:00 2001
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From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Date: Sat, 26 Aug 2017 15:17:06 +0200
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Subject: [PATCH] build: make it possible to disable the build of the flex
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program
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The flex program uses fork(), which isn't available on noMMU
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systems. However, the libfl library does not use fork(), and be used
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by other programs/libraries.
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Therefore, it makes sense to provide an option to disable the build of
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the flex program.
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
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---
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Submitted-upstream: https://github.com/westes/flex/pull/256
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Refused. We'll have to adapt when they do a new release...
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---
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Makefile.am | 2 ++
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configure.ac | 6 ++++++
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doc/Makefile.am | 4 ++++
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src/Makefile.am | 3 +++
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4 files changed, 15 insertions(+)
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diff --git a/Makefile.am b/Makefile.am
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index e790e9d..8b57bc9 100644
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--- a/Makefile.am
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+++ b/Makefile.am
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@@ -62,8 +62,10 @@ ChangeLog: $(srcdir)/tools/git2cl
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indent:
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cd src && $(MAKE) $(AM_MAKEFLAGS) indent
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+if ENABLE_PROGRAM
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install-exec-hook:
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cd $(DESTDIR)$(bindir) && \
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$(LN_S) -f flex$(EXEEXT) flex++$(EXEEXT)
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+endif
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.PHONY: ChangeLog indent
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diff --git a/configure.ac b/configure.ac
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index 8882016..f49872b 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -75,6 +75,12 @@ AC_ARG_ENABLE([libfl],
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[], [enable_libfl=yes])
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AM_CONDITIONAL([ENABLE_LIBFL], [test "x$enable_libfl" = xyes])
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+AC_ARG_ENABLE([program],
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+ [AS_HELP_STRING([--disable-program],
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+ [do not build the flex program, only the libfl library])],
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+ [], [enable_program=yes])
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+AM_CONDITIONAL([ENABLE_PROGRAM], [test "x$enable_program" = xyes])
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+
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# --disable-bootstrap is intended only to workaround problems with bootstrap
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# (e.g. when cross-compiling flex or when bootstrapping has bugs).
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# Ideally we should be able to bootstrap even when cross-compiling.
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diff --git a/src/Makefile.am b/src/Makefile.am
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index 0d13a5a..c73bc17 100644
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--- a/src/Makefile.am
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+++ b/src/Makefile.am
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@@ -4,7 +4,10 @@ LIBS = @LIBS@
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m4 = @M4@
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+if ENABLE_PROGRAM
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bin_PROGRAMS = flex
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+endif
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+
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if ENABLE_BOOTSTRAP
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noinst_PROGRAMS = stage1flex
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endif
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--
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2.9.4
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