From 7ade0c89984c251614e7359effbfea6ef013f0b4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=B6ren=20Tempel?= <soeren+git@soeren-tempel.net>
Date: Wed, 15 Jul 2026 11:54:57 +0200
Subject: gnu: symfpu: Enable the test suite.

* gnu/packages/maths.scm (symfpu)[#:phases]: Add 'fix-tests and 'check.
[source]{origin}<patches>: Add patch required to fix a single test case.
[description]: Fix typo.
* gnu/packages/patches/symfpu-fix-rounding-test-case.patch: New patch.
* gnu/local.mk (dist_patch_DATA): Register it.
---
 gnu/local.mk                                       |  1 +
 gnu/packages/maths.scm                             | 37 ++++++++++++++++++++--
 .../patches/symfpu-fix-rounding-test-case.patch    | 15 +++++++++
 3 files changed, 51 insertions(+), 2 deletions(-)
 create mode 100644 gnu/packages/patches/symfpu-fix-rounding-test-case.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 405a203cc3e..64c215fc31d 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -2198,6 +2198,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/stk-5.0.1-fix-typo.patch			\
   %D%/packages/patches/strace-readlink-tests.patch		\
   %D%/packages/patches/sunxi-tools-remove-sys-io.patch	\
+  %D%/packages/patches/symfpu-fix-rounding-test-case.patch	\
   %D%/packages/patches/patch-hurd-path-max.patch		\
   %D%/packages/patches/perl-5.14-autosplit-default-time.patch	\
   %D%/packages/patches/perl-5.14-module-pluggable-search.patch	\
diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm
index 72a963db701..db6eceabeae 100644
--- a/gnu/packages/maths.scm
+++ b/gnu/packages/maths.scm
@@ -8397,7 +8397,8 @@ s-expression-based format.")
              (commit (string-append "symfpu-" version "-dual-license"))))
        (file-name (git-file-name name version))
        (sha256
-        (base32 "13a9y0spyi6pggbhjgwi9g2qy822h1zakzhhwvm8qgk5c4njv3c6"))))
+        (base32 "13a9y0spyi6pggbhjgwi9g2qy822h1zakzhhwvm8qgk5c4njv3c6"))
+       (patches (search-patches "symfpu-fix-rounding-test-case.patch"))))
     (build-system copy-build-system)
     (arguments
      (list
@@ -8407,6 +8408,38 @@ s-expression-based format.")
           ("utils" "include/symfpu/utils" #:exclude ("Makefile")))
       #:phases
       #~(modify-phases %standard-phases
+          ;; Make sure that the tests exit with a zero exit status by default.
+          ;; Generated tests have assert(3) statements which exit with a
+          ;; non-zero exit status on test failure.
+          (add-after 'unpack 'fix-tests
+            (lambda _
+              (substitute* "applications/test.cpp"
+               (("return 1") "return 0"))))
+          (add-before 'install 'check
+            (lambda* (#:key tests? #:allow-other-keys)
+              (when tests?
+                ;; To ensure the test application builds prior to 'install,
+                ;; set up a symlink and modify CXXFLAGS to find the headers.
+                (symlink #$source "symfpu")
+                (invoke "make" "CXXFLAGS=-I." "test")
+
+                ;; Run tests in their breadth (i.e., --allTests) but on a very
+                ;; small value range as otherwise the tests run for a long time.
+                (invoke "./test"
+                        "--allTests"
+                        "--printC"
+                        "--start=0"
+                        "--end=125"
+                        "--verbose")
+
+                ;; Test script generates C code which we then compile & execute.
+                (for-each
+                  (lambda (file)
+                    (let ((case (string-drop-right file (string-length ".c"))))
+                      (format #t "Running test case ~a~%" case)
+                      (invoke "g++" "-std=gnu++11" "-o" case file)
+                      (invoke (string-append "./" case))))
+                  (find-files "." "^testC..*\\.c$")))))
           (add-before 'install 'build-pkgconfig
             (lambda* (#:key outputs #:allow-other-keys)
               (with-output-to-file "symfpu.pc"
@@ -8427,7 +8460,7 @@ s-expression-based format.")
      "Concrete and symbolic implementation of IEEE-754 floating-point numbers")
     (description
      "SoftFPU is a C++ library implementing concrete and symbolic
-mantics for floating point numbers as defined in the IEEE-764 Standard
+mantics for floating point numbers as defined in the IEEE-754 Standard
 r Floating-Point Arithmetic.  It is templated in terms of the
 t-vectors, propositions, floating-point formats and rounding mode types
 ed.  This allow the same code to be executed as an arbitrary precision
diff --git a/gnu/packages/patches/symfpu-fix-rounding-test-case.patch b/gnu/packages/patches/symfpu-fix-rounding-test-case.patch
new file mode 100644
index 00000000000..120807653d3
--- /dev/null
+++ b/gnu/packages/patches/symfpu-fix-rounding-test-case.patch
@@ -0,0 +1,15 @@
+Taken from: https://github.com/martin-cs/symfpu/pull/13
+
+diff --git a/applications/test.cpp b/applications/test.cpp
+index 2a92a40..4f6b157 100644
+--- a/applications/test.cpp
++++ b/applications/test.cpp
+@@ -1186,7 +1186,7 @@ int main (int argc, char **argv) {
+     {0,0,                "min", INST(binaryFunction, min),              "fminf(f,g)",  "(fp.min f g)"},
+     {0,1,               "sqrt", INST(unaryRoundedFunction, sqrt),       "sqrtf(f)",  "(fp.sqrt rm f)"},
+     {0,1,  "round_to_integral", INST(unaryRoundedFunction, rti),        "(fegetround()==FE_TONEAREST) ? rintf(f) : (fegetround()==FE_UPWARD) ? ceilf(f) : (fegetround()==FE_DOWNWARD) ? floorf(f) : truncf(f)",  "(fp.roundToIntegral rm f)"},
+-    {0,1,                "fma", INST(ternaryRoundedFunction, fma),      "fmaf(f,g)",  "(fp.fma rm f g h)"},
++    {0,1,                "fma", INST(ternaryRoundedFunction, fma),      "fmaf(f,g,h)",  "(fp.fma rm f g h)"},
+     {0,0,          "remainder", INST(binaryFunction, rem),              "remainderf(f,g)",  "(fp.remainder f g)"},
+     {0,0,                 NULL, NULL, NULL, NULL,                           NULL,  NULL}
+   };
-- 
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