guix/gnu/packages/patches/grantlee-fix-i586-precision.patch
宋文武 55f3b17915
gnu: grantlee: Fix build on i686-linux.
This fixes a test (formatfiltertest07) failure on i686-linux.
See also <https://github.com/steveire/grantlee/issues/85>.

* gnu/packages/patches/grantlee-fix-i586-precision.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/qt.scm (grantlee)[source]: Add patch.
2023-08-08 21:54:54 +08:00

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From 13094b78a790786030a468453c2b3ead4c7fd9cf Mon Sep 17 00:00:00 2001
From: Fabian Vogt <fabian@ritter-vogt.de>
Date: Sun, 13 Nov 2022 14:01:21 +0100
Subject: [PATCH] Fix formatting of some larger file sizes on 32bit x86
With the x87 FPU available, GCC uses long double precision for some variables.
Due to the function call passing a double, some comparisons break down.
That resulted in "1.00 YB" being printed as "1000.00 ZB" instead.
Fixes #85
---
templates/lib/util.cpp | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/templates/lib/util.cpp b/templates/lib/util.cpp
index 504674a7..a0381c59 100644
--- a/templates/lib/util.cpp
+++ b/templates/lib/util.cpp
@@ -23,6 +23,7 @@
#include "metaenumvariable_p.h"
#include "metatype.h"
+#include <cfloat>
#include <QtCore/QStringList>
QString Grantlee::unescapeStringLiteral(const QString &input)
@@ -212,7 +213,13 @@ std::pair<qreal, QString> Grantlee::calcFileSize(qreal size, int unitSystem,
bool found = false;
int count = 0;
const qreal baseVal = (_unitSystem == 10) ? 1000.0F : 1024.0F;
+#if FLT_EVAL_METHOD == 2
+ // Avoid that this is treated as long double, as the increased
+ // precision breaks the comparison below.
+ volatile qreal current = 1.0F;
+#else
qreal current = 1.0F;
+#endif
int units = decimalUnits.size();
while (!found && (count < units)) {
current *= baseVal;