From 14c7b23560faeb1c189b40db4669f3efaef4648c Mon Sep 17 00:00:00 2001
From: Dan Horák <dan@danny.cz>
Date: Nov 05 2020 08:55:02 +0000
Subject: - fix build with LTO (#1877485)


---

diff --git a/libsigrok-0.5.2-lto.patch b/libsigrok-0.5.2-lto.patch
new file mode 100644
index 0000000..d1f2831
--- /dev/null
+++ b/libsigrok-0.5.2-lto.patch
@@ -0,0 +1,76 @@
+From 3decd3b1f0cbb3a035f72e9eade42279d0507b89 Mon Sep 17 00:00:00 2001
+From: Gerhard Sittig <gerhard.sittig@gmx.net>
+Date: Tue, 3 Nov 2020 18:25:18 +0100
+Subject: [PATCH] driver_list: unbreak list of builtin drivers for LTO
+ configurations
+
+Check for the availability of the "no_reorder" linker attribute, which
+keeps the list of builtin drivers in shape on LTO enabled build setups.
+Keep backwards compatibility for platforms which lack support for the
+"no_reorder" attribute. Phrase the implementation such that other
+keywords as well as user provided external specs are possible.
+
+This resolves bug #1433.
+
+Submitted-By: Ivan Mironov <mironov.ivan@gmail.com>
+---
+ src/driver_list_start.c  |  1 +
+ src/driver_list_stop.c   |  1 +
+ src/libsigrok-internal.h | 10 ++++++++++
+ 3 files changed, 12 insertions(+)
+
+diff --git a/src/driver_list_start.c b/src/driver_list_start.c
+index 7b6c7755..535e3312 100644
+--- a/src/driver_list_start.c
++++ b/src/driver_list_start.c
+@@ -28,6 +28,7 @@
+  */
+ 
+ SR_PRIV const struct sr_dev_driver *sr_driver_list__start[]
++	SR_DRIVER_LIST_NOREORDER
+ 	__attribute__((section (SR_DRIVER_LIST_SECTION),
+ 		       used, aligned(sizeof(struct sr_dev_driver *))))
+   = { NULL /* Dummy item, as zero length arrays are not allowed by C99 */ };
+diff --git a/src/driver_list_stop.c b/src/driver_list_stop.c
+index ff2c51de..eefda055 100644
+--- a/src/driver_list_stop.c
++++ b/src/driver_list_stop.c
+@@ -28,6 +28,7 @@
+  */
+ 
+ SR_PRIV const struct sr_dev_driver *sr_driver_list__stop[]
++	SR_DRIVER_LIST_NOREORDER
+ 	__attribute__((section (SR_DRIVER_LIST_SECTION),
+ 		       used, aligned(sizeof(struct sr_dev_driver *))))
+   = { NULL /* Dummy item, as zero length arrays are not allowed by C99 */ };
+diff --git a/src/libsigrok-internal.h b/src/libsigrok-internal.h
+index 98d1631e..19fcccfd 100644
+--- a/src/libsigrok-internal.h
++++ b/src/libsigrok-internal.h
+@@ -967,6 +967,15 @@ static inline void write_dblle_inc(uint8_t **p, double x)
+ #define SR_DRIVER_LIST_SECTION "__sr_driver_list"
+ #endif
+ 
++#if !defined SR_DRIVER_LIST_NOREORDER && defined __has_attribute
++#if __has_attribute(no_reorder)
++#define SR_DRIVER_LIST_NOREORDER __attribute__((no_reorder))
++#endif
++#endif
++#if !defined SR_DRIVER_LIST_NOREORDER
++#define SR_DRIVER_LIST_NOREORDER /* EMPTY */
++#endif
++
+ /**
+  * Register a list of hardware drivers.
+  *
+@@ -996,6 +1005,7 @@ static inline void write_dblle_inc(uint8_t **p, double x)
+  */
+ #define SR_REGISTER_DEV_DRIVER_LIST(name, ...) \
+ 	static const struct sr_dev_driver *name[] \
++		SR_DRIVER_LIST_NOREORDER \
+ 		__attribute__((section (SR_DRIVER_LIST_SECTION), used, \
+ 			aligned(sizeof(struct sr_dev_driver *)))) \
+ 		= { \
+-- 
+2.26.2
+
diff --git a/libsigrok.spec b/libsigrok.spec
index 2405f65..896b751 100644
--- a/libsigrok.spec
+++ b/libsigrok.spec
@@ -1,11 +1,14 @@
 Name:           libsigrok
 Version:        0.5.2
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Basic hardware access drivers for logic analyzers
 # Combined GPLv3+ and GPLv2+ and BSD
 License:        GPLv3+
 URL:            http://www.sigrok.org/
 Source0:        http://sigrok.org/download/source/libsigrok/%{name}-%{version}.tar.gz
+# https://bugzilla.redhat.com/show_bug.cgi?id=1877485
+# https://sigrok.org/gitweb/?p=libsigrok.git;a=commit;h=3decd3b1f0cbb3a035f72e9eade42279d0507b89
+Patch0:         libsigrok-0.5.2-lto.patch
 
 BuildRequires:  gcc-c++
 BuildRequires:  glib2-devel
@@ -60,7 +63,7 @@ with %{name}.
 
 
 %prep
-%setup -q
+%autosetup -p1
 # Upstream thinks it's a good idea to have two udev files. We disagree.
 sed -e 's/ENV{ID_SIGROK}="1"/TAG+="uaccess"/g' contrib/60-libsigrok.rules -i
 
@@ -86,8 +89,6 @@ install -D -p -m 0644 contrib/60-libsigrok.rules %{buildroot}%{_udevrulesdir}/60
 
 find %{buildroot} -name '*.la' -exec rm -f {} ';'
 
-%ldconfig_scriptlets
-%ldconfig_scriptlets cxx
 
 %files
 %doc README README.devices NEWS COPYING
@@ -117,6 +118,9 @@ find %{buildroot} -name '*.la' -exec rm -f {} ';'
 
 
 %changelog
+* Thu Nov 05 2020 Dan Horák <dan[at]danny.cz> - 0.5.2-4
+- fix build with LTO (#1877485)
+
 * Tue Jul 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 0.5.2-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild