[bug#40663] [PATCH] gnu: libqalculate: Fixes for libcurl gnutls CA cert bundle

[R Veera Kumar <vkor@vkten.in>]

* gnu/packages/patches/libqalculate-3.8.0-libcurl-ssl-fix.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/maths.scm (libqalculate)[source]: Use it.
---
 gnu/local.mk                                  |  1 +
 gnu/packages/maths.scm                        |  4 ++-
 .../libqalculate-3.8.0-libcurl-ssl-fix.patch  | 29 +++++++++++++++++++
 3 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 gnu/packages/patches/libqalculate-3.8.0-libcurl-ssl-fix.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 952fc55df4..ece99b892f 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1144,6 +1144,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/libmpeg2-global-symbol-test.patch	\
   %D%/packages/patches/libmygpo-qt-fix-qt-5.11.patch		\
   %D%/packages/patches/libmygpo-qt-missing-qt5-modules.patch	\
+  %D%/packages/patches/libqalculate-3.8.0-libcurl-ssl-fix.patch	\
   %D%/packages/patches/libsndfile-armhf-type-checks.patch	\
   %D%/packages/patches/libsndfile-CVE-2017-8361-8363-8365.patch	\
   %D%/packages/patches/libsndfile-CVE-2017-8362.patch		\
diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm
index 9930f491a2..7db2b31012 100644
--- a/gnu/packages/maths.scm
+++ b/gnu/packages/maths.scm
@@ -5416,7 +5416,9 @@ researchers and developers alike to get started on SAT.")
              (commit (string-append "v" version))))
        (file-name (git-file-name name version))
        (sha256
-        (base32 "1vbaza9c7159xf2ym90l0xkyj2mp6c3hbghhsqn29yvz08fda9df"))))
+        (base32 "1vbaza9c7159xf2ym90l0xkyj2mp6c3hbghhsqn29yvz08fda9df"))
+       (patches
+        (search-patches "libqalculate-3.8.0-libcurl-ssl-fix.patch"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("pkg-config" ,pkg-config)
diff --git a/gnu/packages/patches/libqalculate-3.8.0-libcurl-ssl-fix.patch b/gnu/packages/patches/libqalculate-3.8.0-libcurl-ssl-fix.patch
new file mode 100644
index 0000000000..d13c9feaf7
--- /dev/null
+++ b/gnu/packages/patches/libqalculate-3.8.0-libcurl-ssl-fix.patch
@@ -0,0 +1,29 @@
+Author: R Veera Kumar 2020 <vkor@vkten.in>
+Desc:
+ 1) Fixes download of exchange rates by specifying SSL CA certificates bundle
+    while using libcurl (Since libcurl in guix is compiled without using a
+    default CA cert bundle file)
+ 2) Like above fix for using https site in another case
+
+diff -uNr libqalculate-3.8.0/libqalculate/Calculator-definitions.cc libqalculate-3.8.0.new/libqalculate/Calculator-definitions.cc
+--- libqalculate-3.8.0/libqalculate/Calculator-definitions.cc	2020-02-16 15:08:29.000000000 +0530
++++ libqalculate-3.8.0.new/libqalculate/Calculator-definitions.cc	2020-04-16 18:07:26.839310304 +0530
+@@ -3610,6 +3610,7 @@
+ 	curl = curl_easy_init();
+ 	if(!curl) {return false;}
+ 	curl_easy_setopt(curl, CURLOPT_URL, getExchangeRatesUrl(1).c_str());
++	curl_easy_setopt(curl, CURLOPT_CAINFO, "/etc/ssl/certs/ca-certificates.crt");
+ 	curl_easy_setopt(curl, CURLOPT_TIMEOUT, timeout);
+ 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+ 	curl_easy_setopt(curl, CURLOPT_WRITEDATA, &sbuffer);
+diff -uNr libqalculate-3.8.0/libqalculate/util.cc libqalculate-3.8.0.new/libqalculate/util.cc
+--- libqalculate-3.8.0/libqalculate/util.cc	2019-12-14 22:56:45.000000000 +0530
++++ libqalculate-3.8.0.new/libqalculate/util.cc	2020-04-16 18:06:55.930816131 +0530
+@@ -769,6 +769,7 @@
+ 	curl = curl_easy_init();
+ 	if(!curl) {return -1;}
+ 	curl_easy_setopt(curl, CURLOPT_URL, "https://qalculate.github.io/CURRENT_VERSIONS");
++	curl_easy_setopt(curl, CURLOPT_CAINFO, "/etc/ssl/certs/ca-certificates.crt");
+ 	curl_easy_setopt(curl, CURLOPT_TIMEOUT, timeout);
+ 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+ 	curl_easy_setopt(curl, CURLOPT_WRITEDATA, &sbuffer);
-- 
2.26.0