[Buildroot] [PATCH 1/1] package/harfbuzz: fix build with gcc < 7

[Buildroot] [PATCH 1/1] package/harfbuzz: fix build with gcc < 7

[Bernd Kuhls]

Fixes various build errors

In file included from ../src/hb-kern.hh:32:0,
                 from ../src/hb-ot-shape-fallback.cc:32:
../src/hb-ot-layout-gpos-table.hh:50:117: error: specialization of 'template<class context_t> static typename context_t::return_t OT::Layout::GPOS_impl::PosLookup::dispatch_recurse_func(context_t*, unsigned int)' in different namespace [-fpermissive]

introduced by bumping harfbuzz to 4.4.1 in
03022329e02332c22f44e0e0a9b17d8454ba26ae

The build error was not yet caught by the autobuilders but can be
reproduced using this defconfig:
http://autobuild.buildroot.org/results/3fe7526b685368007ae0f66e15ef2b27d30d5063/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
---
 .../0004-GPOS-Fix-build-on-GCC-7.patch        | 97 +++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 package/harfbuzz/0004-GPOS-Fix-build-on-GCC-7.patch

diff --git a/package/harfbuzz/0004-GPOS-Fix-build-on-GCC-7.patch b/package/harfbuzz/0004-GPOS-Fix-build-on-GCC-7.patch
new file mode 100644
index 0000000000..ead6fc024f
--- /dev/null
+++ b/package/harfbuzz/0004-GPOS-Fix-build-on-GCC-7.patch
@@ -0,0 +1,97 @@
+From 3238cb744bb570a75326ab4438968c59069e9af2 Mon Sep 17 00:00:00 2001
+From: Kleis Auke Wolthuizen <github@kleisauke.nl>
+Date: Wed, 6 Jul 2022 13:18:14 +0200
+Subject: [PATCH] [GPOS] Fix build on GCC < 7
+
+[Retrieved (and backported) from:
+https://github.com/harfbuzz/harfbuzz/commit/3238cb744bb570a75326ab4438968c59069e9af2]
+Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
+---
+ src/OT/Layout/GPOS/GPOS.hh     | 17 ++++++++++-------
+ src/hb-ot-layout-gpos-table.hh |  6 ++++--
+ 2 files changed, 14 insertions(+), 9 deletions(-)
+
+diff --git a/src/OT/Layout/GPOS/GPOS.hh b/src/OT/Layout/GPOS/GPOS.hh
+index 7fb97d7568..23b0b090a2 100644
+--- a/src/OT/Layout/GPOS.hh
++++ b/src/OT/Layout/GPOS.hh
+@@ -7,6 +7,9 @@
+ #include "GPOS/PosLookup.hh"
+ 
+ namespace OT {
++
++using Layout::GPOS_impl::PosLookup;
++
+ namespace Layout {
+ 
+ static void
+@@ -25,10 +28,10 @@ struct GPOS : GSUBGPOS
+ {
+   static constexpr hb_tag_t tableTag = HB_OT_TAG_GPOS;
+ 
+-  using Lookup = GPOS_impl::PosLookup;
++  using Lookup = PosLookup;
+ 
+-  const GPOS_impl::PosLookup& get_lookup (unsigned int i) const
+-  { return static_cast<const GPOS_impl::PosLookup &> (GSUBGPOS::get_lookup (i)); }
++  const PosLookup& get_lookup (unsigned int i) const
++  { return static_cast<const PosLookup &> (GSUBGPOS::get_lookup (i)); }
+ 
+   static inline void position_start (hb_font_t *font, hb_buffer_t *buffer);
+   static inline void position_finish_advances (hb_font_t *font, hb_buffer_t *buffer);
+@@ -37,11 +40,11 @@ struct GPOS : GSUBGPOS
+   bool subset (hb_subset_context_t *c) const
+   {
+     hb_subset_layout_context_t l (c, tableTag, c->plan->gpos_lookups, c->plan->gpos_langsys, c->plan->gpos_features);
+-    return GSUBGPOS::subset<GPOS_impl::PosLookup> (&l);
++    return GSUBGPOS::subset<PosLookup> (&l);
+   }
+ 
+   bool sanitize (hb_sanitize_context_t *c) const
+-  { return GSUBGPOS::sanitize<GPOS_impl::PosLookup> (c); }
++  { return GSUBGPOS::sanitize<PosLookup> (c); }
+ 
+   HB_INTERNAL bool is_blocklisted (hb_blob_t *blob,
+                                    hb_face_t *face) const;
+@@ -51,7 +54,7 @@ struct GPOS : GSUBGPOS
+     for (unsigned i = 0; i < GSUBGPOS::get_lookup_count (); i++)
+     {
+       if (!c->gpos_lookups->has (i)) continue;
+-      const GPOS_impl::PosLookup &l = get_lookup (i);
++      const PosLookup &l = get_lookup (i);
+       l.dispatch (c);
+     }
+   }
+@@ -59,7 +62,7 @@ struct GPOS : GSUBGPOS
+   void closure_lookups (hb_face_t      *face,
+                         const hb_set_t *glyphs,
+                         hb_set_t       *lookup_indexes /* IN/OUT */) const
+-  { GSUBGPOS::closure_lookups<GPOS_impl::PosLookup> (face, glyphs, lookup_indexes); }
++  { GSUBGPOS::closure_lookups<PosLookup> (face, glyphs, lookup_indexes); }
+ 
+   typedef GSUBGPOS::accelerator_t<GPOS> accelerator_t;
+ };
+diff --git a/src/hb-ot-layout-gpos-table.hh b/src/hb-ot-layout-gpos-table.hh
+index f5059cfa83..8fe987fc50 100644
+--- a/src/hb-ot-layout-gpos-table.hh
++++ b/src/hb-ot-layout-gpos-table.hh
+@@ -32,8 +32,8 @@
+ #include "OT/Layout/GPOS.hh"
+ 
+ namespace OT {
+-
+-using Layout::GPOS_impl::PosLookup;
++namespace Layout {
++namespace GPOS_impl {
+ 
+ // TODO(garretrieger): Move into new layout directory.
+ /* Out-of-class implementation for methods recursing */
+@@ -68,6 +68,8 @@ inline bool PosLookup::dispatch_recurse_func<hb_ot_apply_context_t> (hb_ot_apply
+ }
+ #endif
+ 
++} /* namespace GPOS_impl */
++} /* namespace Layout */
+ } /* namespace OT */
+ 
+ 
-- 
2.30.2

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Re: [Buildroot] [PATCH 1/1] package/harfbuzz: fix build with gcc < 7

[Giulio Benetti]

Hi Bernd,

On 20/07/22 19:17, Bernd Kuhls wrote:
> Fixes various build errors
> 
> In file included from ../src/hb-kern.hh:32:0,
>                   from ../src/hb-ot-shape-fallback.cc:32:
> ../src/hb-ot-layout-gpos-table.hh:50:117: error: specialization of 'template<class context_t> static typename context_t::return_t OT::Layout::GPOS_impl::PosLookup::dispatch_recurse_func(context_t*, unsigned int)' in different namespace [-fpermissive]
> 
> introduced by bumping harfbuzz to 4.4.1 in
> 03022329e02332c22f44e0e0a9b17d8454ba26ae
> 
> The build error was not yet caught by the autobuilders but can be
> reproduced using this defconfig:
> http://autobuild.buildroot.org/results/3fe7526b685368007ae0f66e15ef2b27d30d5063/
> 
> Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>

Thank you for the patch. I've confused the your patch(GPOS) with already
committed patch(GSUB). I've reproduced the bug and with this patch it's 
fixed, so:

Reviewed-by: Giulio Benetti <giulio.benetti@benettiengineering.com>

Best regards!
-- 
Giulio Benetti
Benetti Engineering sas

> ---
>   .../0004-GPOS-Fix-build-on-GCC-7.patch        | 97 +++++++++++++++++++
>   1 file changed, 97 insertions(+)
>   create mode 100644 package/harfbuzz/0004-GPOS-Fix-build-on-GCC-7.patch
> 
> diff --git a/package/harfbuzz/0004-GPOS-Fix-build-on-GCC-7.patch b/package/harfbuzz/0004-GPOS-Fix-build-on-GCC-7.patch
> new file mode 100644
> index 0000000000..ead6fc024f
> --- /dev/null
> +++ b/package/harfbuzz/0004-GPOS-Fix-build-on-GCC-7.patch
> @@ -0,0 +1,97 @@
> +From 3238cb744bb570a75326ab4438968c59069e9af2 Mon Sep 17 00:00:00 2001
> +From: Kleis Auke Wolthuizen <github@kleisauke.nl>
> +Date: Wed, 6 Jul 2022 13:18:14 +0200
> +Subject: [PATCH] [GPOS] Fix build on GCC < 7
> +
> +[Retrieved (and backported) from:
> +https://github.com/harfbuzz/harfbuzz/commit/3238cb744bb570a75326ab4438968c59069e9af2]
> +Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
> +---
> + src/OT/Layout/GPOS/GPOS.hh     | 17 ++++++++++-------
> + src/hb-ot-layout-gpos-table.hh |  6 ++++--
> + 2 files changed, 14 insertions(+), 9 deletions(-)
> +
> +diff --git a/src/OT/Layout/GPOS/GPOS.hh b/src/OT/Layout/GPOS/GPOS.hh
> +index 7fb97d7568..23b0b090a2 100644
> +--- a/src/OT/Layout/GPOS.hh
> ++++ b/src/OT/Layout/GPOS.hh
> +@@ -7,6 +7,9 @@
> + #include "GPOS/PosLookup.hh"
> +
> + namespace OT {
> ++
> ++using Layout::GPOS_impl::PosLookup;
> ++
> + namespace Layout {
> +
> + static void
> +@@ -25,10 +28,10 @@ struct GPOS : GSUBGPOS
> + {
> +   static constexpr hb_tag_t tableTag = HB_OT_TAG_GPOS;
> +
> +-  using Lookup = GPOS_impl::PosLookup;
> ++  using Lookup = PosLookup;
> +
> +-  const GPOS_impl::PosLookup& get_lookup (unsigned int i) const
> +-  { return static_cast<const GPOS_impl::PosLookup &> (GSUBGPOS::get_lookup (i)); }
> ++  const PosLookup& get_lookup (unsigned int i) const
> ++  { return static_cast<const PosLookup &> (GSUBGPOS::get_lookup (i)); }
> +
> +   static inline void position_start (hb_font_t *font, hb_buffer_t *buffer);
> +   static inline void position_finish_advances (hb_font_t *font, hb_buffer_t *buffer);
> +@@ -37,11 +40,11 @@ struct GPOS : GSUBGPOS
> +   bool subset (hb_subset_context_t *c) const
> +   {
> +     hb_subset_layout_context_t l (c, tableTag, c->plan->gpos_lookups, c->plan->gpos_langsys, c->plan->gpos_features);
> +-    return GSUBGPOS::subset<GPOS_impl::PosLookup> (&l);
> ++    return GSUBGPOS::subset<PosLookup> (&l);
> +   }
> +
> +   bool sanitize (hb_sanitize_context_t *c) const
> +-  { return GSUBGPOS::sanitize<GPOS_impl::PosLookup> (c); }
> ++  { return GSUBGPOS::sanitize<PosLookup> (c); }
> +
> +   HB_INTERNAL bool is_blocklisted (hb_blob_t *blob,
> +                                    hb_face_t *face) const;
> +@@ -51,7 +54,7 @@ struct GPOS : GSUBGPOS
> +     for (unsigned i = 0; i < GSUBGPOS::get_lookup_count (); i++)
> +     {
> +       if (!c->gpos_lookups->has (i)) continue;
> +-      const GPOS_impl::PosLookup &l = get_lookup (i);
> ++      const PosLookup &l = get_lookup (i);
> +       l.dispatch (c);
> +     }
> +   }
> +@@ -59,7 +62,7 @@ struct GPOS : GSUBGPOS
> +   void closure_lookups (hb_face_t      *face,
> +                         const hb_set_t *glyphs,
> +                         hb_set_t       *lookup_indexes /* IN/OUT */) const
> +-  { GSUBGPOS::closure_lookups<GPOS_impl::PosLookup> (face, glyphs, lookup_indexes); }
> ++  { GSUBGPOS::closure_lookups<PosLookup> (face, glyphs, lookup_indexes); }
> +
> +   typedef GSUBGPOS::accelerator_t<GPOS> accelerator_t;
> + };
> +diff --git a/src/hb-ot-layout-gpos-table.hh b/src/hb-ot-layout-gpos-table.hh
> +index f5059cfa83..8fe987fc50 100644
> +--- a/src/hb-ot-layout-gpos-table.hh
> ++++ b/src/hb-ot-layout-gpos-table.hh
> +@@ -32,8 +32,8 @@
> + #include "OT/Layout/GPOS.hh"
> +
> + namespace OT {
> +-
> +-using Layout::GPOS_impl::PosLookup;
> ++namespace Layout {
> ++namespace GPOS_impl {
> +
> + // TODO(garretrieger): Move into new layout directory.
> + /* Out-of-class implementation for methods recursing */
> +@@ -68,6 +68,8 @@ inline bool PosLookup::dispatch_recurse_func<hb_ot_apply_context_t> (hb_ot_apply
> + }
> + #endif
> +
> ++} /* namespace GPOS_impl */
> ++} /* namespace Layout */
> + } /* namespace OT */
> +
> +

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Re: [Buildroot] [PATCH 1/1] package/harfbuzz: fix build with gcc < 7

[Arnout Vandecappelle]

On 20/07/2022 19:17, Bernd Kuhls wrote:
> Fixes various build errors
> 
> In file included from ../src/hb-kern.hh:32:0,
>                   from ../src/hb-ot-shape-fallback.cc:32:
> ../src/hb-ot-layout-gpos-table.hh:50:117: error: specialization of 'template<class context_t> static typename context_t::return_t OT::Layout::GPOS_impl::PosLookup::dispatch_recurse_func(context_t*, unsigned int)' in different namespace [-fpermissive]
> 
> introduced by bumping harfbuzz to 4.4.1 in
> 03022329e02332c22f44e0e0a9b17d8454ba26ae
> 
> The build error was not yet caught by the autobuilders but can be
> reproduced using this defconfig:
> http://autobuild.buildroot.org/results/3fe7526b685368007ae0f66e15ef2b27d30d5063/
> 
> Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>

  Applied to master, thanks.

  Regards,
  Arnout

> ---
>   .../0004-GPOS-Fix-build-on-GCC-7.patch        | 97 +++++++++++++++++++
>   1 file changed, 97 insertions(+)
>   create mode 100644 package/harfbuzz/0004-GPOS-Fix-build-on-GCC-7.patch
> 
> diff --git a/package/harfbuzz/0004-GPOS-Fix-build-on-GCC-7.patch b/package/harfbuzz/0004-GPOS-Fix-build-on-GCC-7.patch
> new file mode 100644
> index 0000000000..ead6fc024f
> --- /dev/null
> +++ b/package/harfbuzz/0004-GPOS-Fix-build-on-GCC-7.patch
> @@ -0,0 +1,97 @@
> +From 3238cb744bb570a75326ab4438968c59069e9af2 Mon Sep 17 00:00:00 2001
> +From: Kleis Auke Wolthuizen <github@kleisauke.nl>
> +Date: Wed, 6 Jul 2022 13:18:14 +0200
> +Subject: [PATCH] [GPOS] Fix build on GCC < 7
> +
> +[Retrieved (and backported) from:
> +https://github.com/harfbuzz/harfbuzz/commit/3238cb744bb570a75326ab4438968c59069e9af2]
> +Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
> +---
> + src/OT/Layout/GPOS/GPOS.hh     | 17 ++++++++++-------
> + src/hb-ot-layout-gpos-table.hh |  6 ++++--
> + 2 files changed, 14 insertions(+), 9 deletions(-)
> +
> +diff --git a/src/OT/Layout/GPOS/GPOS.hh b/src/OT/Layout/GPOS/GPOS.hh
> +index 7fb97d7568..23b0b090a2 100644
> +--- a/src/OT/Layout/GPOS.hh
> ++++ b/src/OT/Layout/GPOS.hh
> +@@ -7,6 +7,9 @@
> + #include "GPOS/PosLookup.hh"
> +
> + namespace OT {
> ++
> ++using Layout::GPOS_impl::PosLookup;
> ++
> + namespace Layout {
> +
> + static void
> +@@ -25,10 +28,10 @@ struct GPOS : GSUBGPOS
> + {
> +   static constexpr hb_tag_t tableTag = HB_OT_TAG_GPOS;
> +
> +-  using Lookup = GPOS_impl::PosLookup;
> ++  using Lookup = PosLookup;
> +
> +-  const GPOS_impl::PosLookup& get_lookup (unsigned int i) const
> +-  { return static_cast<const GPOS_impl::PosLookup &> (GSUBGPOS::get_lookup (i)); }
> ++  const PosLookup& get_lookup (unsigned int i) const
> ++  { return static_cast<const PosLookup &> (GSUBGPOS::get_lookup (i)); }
> +
> +   static inline void position_start (hb_font_t *font, hb_buffer_t *buffer);
> +   static inline void position_finish_advances (hb_font_t *font, hb_buffer_t *buffer);
> +@@ -37,11 +40,11 @@ struct GPOS : GSUBGPOS
> +   bool subset (hb_subset_context_t *c) const
> +   {
> +     hb_subset_layout_context_t l (c, tableTag, c->plan->gpos_lookups, c->plan->gpos_langsys, c->plan->gpos_features);
> +-    return GSUBGPOS::subset<GPOS_impl::PosLookup> (&l);
> ++    return GSUBGPOS::subset<PosLookup> (&l);
> +   }
> +
> +   bool sanitize (hb_sanitize_context_t *c) const
> +-  { return GSUBGPOS::sanitize<GPOS_impl::PosLookup> (c); }
> ++  { return GSUBGPOS::sanitize<PosLookup> (c); }
> +
> +   HB_INTERNAL bool is_blocklisted (hb_blob_t *blob,
> +                                    hb_face_t *face) const;
> +@@ -51,7 +54,7 @@ struct GPOS : GSUBGPOS
> +     for (unsigned i = 0; i < GSUBGPOS::get_lookup_count (); i++)
> +     {
> +       if (!c->gpos_lookups->has (i)) continue;
> +-      const GPOS_impl::PosLookup &l = get_lookup (i);
> ++      const PosLookup &l = get_lookup (i);
> +       l.dispatch (c);
> +     }
> +   }
> +@@ -59,7 +62,7 @@ struct GPOS : GSUBGPOS
> +   void closure_lookups (hb_face_t      *face,
> +                         const hb_set_t *glyphs,
> +                         hb_set_t       *lookup_indexes /* IN/OUT */) const
> +-  { GSUBGPOS::closure_lookups<GPOS_impl::PosLookup> (face, glyphs, lookup_indexes); }
> ++  { GSUBGPOS::closure_lookups<PosLookup> (face, glyphs, lookup_indexes); }
> +
> +   typedef GSUBGPOS::accelerator_t<GPOS> accelerator_t;
> + };
> +diff --git a/src/hb-ot-layout-gpos-table.hh b/src/hb-ot-layout-gpos-table.hh
> +index f5059cfa83..8fe987fc50 100644
> +--- a/src/hb-ot-layout-gpos-table.hh
> ++++ b/src/hb-ot-layout-gpos-table.hh
> +@@ -32,8 +32,8 @@
> + #include "OT/Layout/GPOS.hh"
> +
> + namespace OT {
> +-
> +-using Layout::GPOS_impl::PosLookup;
> ++namespace Layout {
> ++namespace GPOS_impl {
> +
> + // TODO(garretrieger): Move into new layout directory.
> + /* Out-of-class implementation for methods recursing */
> +@@ -68,6 +68,8 @@ inline bool PosLookup::dispatch_recurse_func<hb_ot_apply_context_t> (hb_ot_apply
> + }
> + #endif
> +
> ++} /* namespace GPOS_impl */
> ++} /* namespace Layout */
> + } /* namespace OT */
> +
> +
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Re: [Buildroot] [PATCH 1/1] package/harfbuzz: fix build with gcc < 7

[Thomas Petazzoni via buildroot]

On Tue, 12 Jul 2022 18:27:12 +0200
Fabrice Fontaine <fontaine.fabrice@gmail.com> wrote:

> Fix the following build failure with gcc < 7 raised since bump to
> version 4.4.0 in commit e186b4d89dcd3eb9fae557959181d7176e7c873c:
> 
> In file included from ../src/hb.hh:473:0,
>                  from ../src/hb-buffer-verify.cc:27:
> ../src/hb-cplusplus.hh:170:13: error: specialization of 'template<class _Tp> struct std::hash' in different namespace [-fpermissive]
>  struct std::hash<hb::shared_ptr<T>>
>              ^
> 
> Fixes:
>  - http://autobuild.buildroot.org/results/3fe7526b685368007ae0f66e15ef2b27d30d5063
> 
> Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
> ---
>  .../0002-cplusplus-Fix-build-on-GCC-7.patch   | 50 +++++++++++++++++
>  .../0003-GSUB-Fix-build-on-GCC-7.patch        | 56 +++++++++++++++++++
>  2 files changed, 106 insertions(+)
>  create mode 100644 package/harfbuzz/0002-cplusplus-Fix-build-on-GCC-7.patch
>  create mode 100644 package/harfbuzz/0003-GSUB-Fix-build-on-GCC-7.patch

Applied to master, thanks.

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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Re: [Buildroot] [PATCH 1/1] package/harfbuzz: fix build with gcc < 7

[Bernd Kuhls]

Am Tue, 12 Jul 2022 18:27:12 +0200 schrieb Fabrice Fontaine:

> Fix the following build failure with gcc < 7 raised since bump to
> version 4.4.0 in commit e186b4d89dcd3eb9fae557959181d7176e7c873c:

Tested-by: Bernd Kuhls <bernd.kuhls@t-online.de>
(build-tested using x86_64-buildroot-linux-uclibc-gcc.br_real (Buildroot 
2022.05-482-gbfcae2469a) 4.9.4)

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Re: [Buildroot] [PATCH 1/1] package/harfbuzz: fix build with gcc < 7

[Giulio Benetti]

Hi Fabrice,

On 12/07/22 18:27, Fabrice Fontaine wrote:
> Fix the following build failure with gcc < 7 raised since bump to
> version 4.4.0 in commit e186b4d89dcd3eb9fae557959181d7176e7c873c:
> 
> In file included from ../src/hb.hh:473:0,
>                   from ../src/hb-buffer-verify.cc:27:
> ../src/hb-cplusplus.hh:170:13: error: specialization of 'template<class _Tp> struct std::hash' in different namespace [-fpermissive]
>   struct std::hash<hb::shared_ptr<T>>
>               ^
> 
> Fixes:
>   - http://autobuild.buildroot.org/results/3fe7526b685368007ae0f66e15ef2b27d30d5063
> 
> Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

thank you for providing such fix.

Reviewed-by: Giulio Benetti <giulio.benetti@benettiengineering.com>

Best regards
-- 
Giulio Benetti
CTO/CEO@Benetti Engineering sas

> ---
>   .../0002-cplusplus-Fix-build-on-GCC-7.patch   | 50 +++++++++++++++++
>   .../0003-GSUB-Fix-build-on-GCC-7.patch        | 56 +++++++++++++++++++
>   2 files changed, 106 insertions(+)
>   create mode 100644 package/harfbuzz/0002-cplusplus-Fix-build-on-GCC-7.patch
>   create mode 100644 package/harfbuzz/0003-GSUB-Fix-build-on-GCC-7.patch
> 
> diff --git a/package/harfbuzz/0002-cplusplus-Fix-build-on-GCC-7.patch b/package/harfbuzz/0002-cplusplus-Fix-build-on-GCC-7.patch
> new file mode 100644
> index 0000000000..de2955d8b5
> --- /dev/null
> +++ b/package/harfbuzz/0002-cplusplus-Fix-build-on-GCC-7.patch
> @@ -0,0 +1,50 @@
> +From 7b51bc95d9cf0d9a2e91a37319fa34e4e5f26927 Mon Sep 17 00:00:00 2001
> +From: Kleis Auke Wolthuizen <github@kleisauke.nl>
> +Date: Wed, 6 Jul 2022 12:58:15 +0200
> +Subject: [PATCH] [cplusplus] Fix build on GCC < 7
> +
> +[Retrieved from:
> +https://github.com/harfbuzz/harfbuzz/commit/7b51bc95d9cf0d9a2e91a37319fa34e4e5f26927]
> +Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
> +---
> + src/hb-cplusplus.hh | 12 ++++++++++--
> + 1 file changed, 10 insertions(+), 2 deletions(-)
> +
> +diff --git a/src/hb-cplusplus.hh b/src/hb-cplusplus.hh
> +index 86d0452080..f06a32d912 100644
> +--- a/src/hb-cplusplus.hh
> ++++ b/src/hb-cplusplus.hh
> +@@ -166,8 +166,14 @@ HB_DEFINE_VTABLE (unicode_funcs);
> +
> + } // namespace hb
> +
> ++/* Workaround for GCC < 7, see:
> ++ * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56480
> ++ * https://stackoverflow.com/a/25594741 */
> ++namespace std {
> ++
> ++
> + template<typename T>
> +-struct std::hash<hb::shared_ptr<T>>
> ++struct hash<hb::shared_ptr<T>>
> + {
> +     std::size_t operator()(const hb::shared_ptr<T>& v) const noexcept
> +     {
> +@@ -177,7 +183,7 @@ struct std::hash<hb::shared_ptr<T>>
> + };
> +
> + template<typename T>
> +-struct std::hash<hb::unique_ptr<T>>
> ++struct hash<hb::unique_ptr<T>>
> + {
> +     std::size_t operator()(const hb::unique_ptr<T>& v) const noexcept
> +     {
> +@@ -187,6 +193,8 @@ struct std::hash<hb::unique_ptr<T>>
> + };
> +
> +
> ++} // namespace std
> ++
> + #endif /* __cplusplus */
> +
> + #endif /* HB_CPLUSPLUS_HH */
> diff --git a/package/harfbuzz/0003-GSUB-Fix-build-on-GCC-7.patch b/package/harfbuzz/0003-GSUB-Fix-build-on-GCC-7.patch
> new file mode 100644
> index 0000000000..d3355443b7
> --- /dev/null
> +++ b/package/harfbuzz/0003-GSUB-Fix-build-on-GCC-7.patch
> @@ -0,0 +1,56 @@
> +From 79eb0f74860fb6309e3162b4f17f98481c05a318 Mon Sep 17 00:00:00 2001
> +From: Kleis Auke Wolthuizen <github@kleisauke.nl>
> +Date: Wed, 6 Jul 2022 13:29:55 +0200
> +Subject: [PATCH] [GSUB] Fix build on GCC < 7
> +
> +[Retrieved (and backported) from:
> +https://github.com/harfbuzz/harfbuzz/commit/79eb0f74860fb6309e3162b4f17f98481c05a318]
> +Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
> +---
> + src/OT/Layout/GSUB/GSUB.hh     | 5 +++--
> + src/hb-ot-layout-gsub-table.hh | 8 ++++----
> + 2 files changed, 7 insertions(+), 6 deletions(-)
> +
> +diff --git a/src/OT/Layout/GSUB/GSUB.hh b/src/OT/Layout/GSUB/GSUB.hh
> +index 372862e2bb..750dca1da3 100644
> +--- a/src/OT/Layout/GSUB/GSUB.hh
> ++++ b/src/OT/Layout/GSUB/GSUB.hh
> +@@ -5,9 +5,10 @@
> + #include "Common.hh"
> + #include "SubstLookup.hh"
> +
> +-using OT::Layout::GSUB::SubstLookup;
> +-
> + namespace OT {
> ++
> ++using Layout::GSUB::SubstLookup;
> ++
> + namespace Layout {
> +
> + /*
> +diff --git a/src/hb-ot-layout-gsub-table.hh b/src/hb-ot-layout-gsub-table.hh
> +index 1eca613b6a..50301ff1d9 100644
> +--- a/src/hb-ot-layout-gsub-table.hh
> ++++ b/src/hb-ot-layout-gsub-table.hh
> +@@ -32,9 +32,8 @@
> + #include "OT/Layout/GSUB/GSUB.hh"
> +
> + namespace OT {
> +-
> +-using Layout::GSUB::SubstLookup;
> +-using Layout::GSUB::ExtensionSubst;
> ++namespace Layout {
> ++namespace GSUB {
> +
> + // TODO(garretrieger): Move into the new layout directory.
> + /* Out-of-class implementation for methods recursing */
> +@@ -82,7 +81,8 @@ inline bool SubstLookup::dispatch_recurse_func<hb_ot_apply_context_t> (hb_ot_app
> + }
> + #endif
> +
> +-
> ++} /* namespace GSUB */
> ++} /* namespace Layout */
> + } /* namespace OT */
> +
> +

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[Buildroot] [PATCH 1/1] package/harfbuzz: fix build with gcc < 7

[Fabrice Fontaine]

Fix the following build failure with gcc < 7 raised since bump to
version 4.4.0 in commit e186b4d89dcd3eb9fae557959181d7176e7c873c:

In file included from ../src/hb.hh:473:0,
                 from ../src/hb-buffer-verify.cc:27:
../src/hb-cplusplus.hh:170:13: error: specialization of 'template<class _Tp> struct std::hash' in different namespace [-fpermissive]
 struct std::hash<hb::shared_ptr<T>>
             ^

Fixes:
 - http://autobuild.buildroot.org/results/3fe7526b685368007ae0f66e15ef2b27d30d5063

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
---
 .../0002-cplusplus-Fix-build-on-GCC-7.patch   | 50 +++++++++++++++++
 .../0003-GSUB-Fix-build-on-GCC-7.patch        | 56 +++++++++++++++++++
 2 files changed, 106 insertions(+)
 create mode 100644 package/harfbuzz/0002-cplusplus-Fix-build-on-GCC-7.patch
 create mode 100644 package/harfbuzz/0003-GSUB-Fix-build-on-GCC-7.patch

diff --git a/package/harfbuzz/0002-cplusplus-Fix-build-on-GCC-7.patch b/package/harfbuzz/0002-cplusplus-Fix-build-on-GCC-7.patch
new file mode 100644
index 0000000000..de2955d8b5
--- /dev/null
+++ b/package/harfbuzz/0002-cplusplus-Fix-build-on-GCC-7.patch
@@ -0,0 +1,50 @@
+From 7b51bc95d9cf0d9a2e91a37319fa34e4e5f26927 Mon Sep 17 00:00:00 2001
+From: Kleis Auke Wolthuizen <github@kleisauke.nl>
+Date: Wed, 6 Jul 2022 12:58:15 +0200
+Subject: [PATCH] [cplusplus] Fix build on GCC < 7
+
+[Retrieved from:
+https://github.com/harfbuzz/harfbuzz/commit/7b51bc95d9cf0d9a2e91a37319fa34e4e5f26927]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ src/hb-cplusplus.hh | 12 ++++++++++--
+ 1 file changed, 10 insertions(+), 2 deletions(-)
+
+diff --git a/src/hb-cplusplus.hh b/src/hb-cplusplus.hh
+index 86d0452080..f06a32d912 100644
+--- a/src/hb-cplusplus.hh
++++ b/src/hb-cplusplus.hh
+@@ -166,8 +166,14 @@ HB_DEFINE_VTABLE (unicode_funcs);
+ 
+ } // namespace hb
+ 
++/* Workaround for GCC < 7, see:
++ * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56480
++ * https://stackoverflow.com/a/25594741 */
++namespace std {
++
++
+ template<typename T>
+-struct std::hash<hb::shared_ptr<T>>
++struct hash<hb::shared_ptr<T>>
+ {
+     std::size_t operator()(const hb::shared_ptr<T>& v) const noexcept
+     {
+@@ -177,7 +183,7 @@ struct std::hash<hb::shared_ptr<T>>
+ };
+ 
+ template<typename T>
+-struct std::hash<hb::unique_ptr<T>>
++struct hash<hb::unique_ptr<T>>
+ {
+     std::size_t operator()(const hb::unique_ptr<T>& v) const noexcept
+     {
+@@ -187,6 +193,8 @@ struct std::hash<hb::unique_ptr<T>>
+ };
+ 
+ 
++} // namespace std
++
+ #endif /* __cplusplus */
+ 
+ #endif /* HB_CPLUSPLUS_HH */
diff --git a/package/harfbuzz/0003-GSUB-Fix-build-on-GCC-7.patch b/package/harfbuzz/0003-GSUB-Fix-build-on-GCC-7.patch
new file mode 100644
index 0000000000..d3355443b7
--- /dev/null
+++ b/package/harfbuzz/0003-GSUB-Fix-build-on-GCC-7.patch
@@ -0,0 +1,56 @@
+From 79eb0f74860fb6309e3162b4f17f98481c05a318 Mon Sep 17 00:00:00 2001
+From: Kleis Auke Wolthuizen <github@kleisauke.nl>
+Date: Wed, 6 Jul 2022 13:29:55 +0200
+Subject: [PATCH] [GSUB] Fix build on GCC < 7
+
+[Retrieved (and backported) from:
+https://github.com/harfbuzz/harfbuzz/commit/79eb0f74860fb6309e3162b4f17f98481c05a318]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ src/OT/Layout/GSUB/GSUB.hh     | 5 +++--
+ src/hb-ot-layout-gsub-table.hh | 8 ++++----
+ 2 files changed, 7 insertions(+), 6 deletions(-)
+
+diff --git a/src/OT/Layout/GSUB/GSUB.hh b/src/OT/Layout/GSUB/GSUB.hh
+index 372862e2bb..750dca1da3 100644
+--- a/src/OT/Layout/GSUB/GSUB.hh
++++ b/src/OT/Layout/GSUB/GSUB.hh
+@@ -5,9 +5,10 @@
+ #include "Common.hh"
+ #include "SubstLookup.hh"
+ 
+-using OT::Layout::GSUB::SubstLookup;
+-
+ namespace OT {
++
++using Layout::GSUB::SubstLookup;
++
+ namespace Layout {
+ 
+ /*
+diff --git a/src/hb-ot-layout-gsub-table.hh b/src/hb-ot-layout-gsub-table.hh
+index 1eca613b6a..50301ff1d9 100644
+--- a/src/hb-ot-layout-gsub-table.hh
++++ b/src/hb-ot-layout-gsub-table.hh
+@@ -32,9 +32,8 @@
+ #include "OT/Layout/GSUB/GSUB.hh"
+ 
+ namespace OT {
+-
+-using Layout::GSUB::SubstLookup;
+-using Layout::GSUB::ExtensionSubst;
++namespace Layout {
++namespace GSUB {
+ 
+ // TODO(garretrieger): Move into the new layout directory.
+ /* Out-of-class implementation for methods recursing */
+@@ -82,7 +81,8 @@ inline bool SubstLookup::dispatch_recurse_func<hb_ot_apply_context_t> (hb_ot_app
+ }
+ #endif
+ 
+-
++} /* namespace GSUB */
++} /* namespace Layout */
+ } /* namespace OT */
+ 
+ 
-- 
2.35.1

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