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23 id 1YzJrL-0007OH-MK; Mon, 01 Jun 2015 07:10:07 +0000
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26 From: David Bremner <david@tethera.net>
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27 To: David Bremner <david@tethera.net>, notmuch@notmuchmail.org
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28 Subject: [patch v3 2/4] build/ruby: make use of -Wl,--no-undefined
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30 Date: Mon, 1 Jun 2015 09:09:00 +0200
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31 Message-Id: <1433142542-2307-3-git-send-email-david@tethera.net>
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34 References: <1425679073-30439-5-git-send-email-david@tethera.net>
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35 <1433142542-2307-1-git-send-email-david@tethera.net>
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50 In particular this is supposed to help build on systems (presumably
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51 using a non-gnu ld) where this flag is not available.
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53 bindings/Makefile.local | 4 +++-
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54 bindings/ruby/extconf.rb | 5 +++--
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55 configure | 13 +++++++++++++
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56 3 files changed, 19 insertions(+), 3 deletions(-)
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58 diff --git a/bindings/Makefile.local b/bindings/Makefile.local
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59 index e0b0bf0..2ad0b86 100644
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60 --- a/bindings/Makefile.local
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61 +++ b/bindings/Makefile.local
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62 @@ -5,7 +5,9 @@ dir := bindings
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63 # force the shared library to be built
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64 ruby-bindings: lib/libnotmuch.so
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65 ifeq ($(HAVE_RUBY_DEV),1)
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66 - cd $(dir)/ruby && ruby extconf.rb --vendor
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67 + cd $(dir)/ruby && \
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68 + EXTRA_LDFLAGS="$(NO_UNDEFINED_LDFLAGS)" \
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69 + ruby extconf.rb --vendor
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70 $(MAKE) -C $(dir)/ruby
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72 @echo Missing dependency, skipping ruby bindings
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73 diff --git a/bindings/ruby/extconf.rb b/bindings/ruby/extconf.rb
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74 index 6160db2..6d5607e 100644
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75 --- a/bindings/ruby/extconf.rb
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76 +++ b/bindings/ruby/extconf.rb
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77 @@ -10,8 +10,9 @@ dir = File.join('..', '..', 'lib')
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79 $INCFLAGS = "-I#{dir} #{$INCFLAGS}"
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81 -# make sure there are no undefined symbols
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82 -$LDFLAGS += ' -Wl,--no-undefined'
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83 +if ENV['EXTRA_LDFLAGS']
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84 + $LDFLAGS += " " + ENV['EXTRA_LDFLAGS']
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87 def have_local_library(lib, path, func, headers = nil)
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88 checking_for checking_message(func, lib) do
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89 diff --git a/configure b/configure
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90 index 5a862b1..e3b4902 100755
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93 @@ -750,6 +750,16 @@ else
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94 as_needed_ldflags=""
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97 +printf "Checking for -Wl,--no-undefined... "
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98 +if ${CC} -Wl,--no-undefined -o minimal minimal.c >/dev/null 2>&1
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101 + no_undefined_ldflags="-Wl,--no-undefined"
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103 + printf "No (nothing to worry about).\n"
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104 + no_undefined_ldflags=""
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108 printf "Checking for available C++ compiler warning flags... "
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109 for flag in -Wall -Wextra -Wwrite-strings; do
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110 @@ -954,6 +964,9 @@ RPATH_LDFLAGS = ${rpath_ldflags}
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111 # Flags needed to have linker link only to necessary libraries
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112 AS_NEEDED_LDFLAGS = ${as_needed_ldflags}
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114 +# Flags to have the linker flag undefined symbols in object files
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115 +NO_UNDEFINED_LDFLAGS = ${no_undefined_ldflags}
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117 # Whether valgrind header files are available
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118 HAVE_VALGRIND = ${have_valgrind}
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