Source: pilercr
Version: 1.06+dfsg-3
Tags: patch
User: debian-cr...@lists.debian.org
Usertags: ftcbfs

pilercr fails to cross build from source, because it builds for the
build architecture. The upstream makefile uses a non-standard compiler
variable GPP rather than CXX, so it doesn't use the compiler passed by
dh_auto_build. After renaming it, it fails due to help2man. Given that
pilercr is small and has few dependencies, a simple workaround is adding
a native build pass for help2man. The attached patch makes pilercr cross
buildable. Please consider applying it.

Helmut
diff --minimal -Nru pilercr-1.06+dfsg/debian/changelog 
pilercr-1.06+dfsg/debian/changelog
--- pilercr-1.06+dfsg/debian/changelog  2020-12-05 11:52:04.000000000 +0100
+++ pilercr-1.06+dfsg/debian/changelog  2020-12-15 15:37:19.000000000 +0100
@@ -1,3 +1,12 @@
+pilercr (1.06+dfsg-3.1) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload.
+  * Fix FTCBFS: (Closes: #-1)
+    + Pass C++ compiler as GPP variable.
+    + Add native build pass for help2man.
+
+ -- Helmut Grohne <hel...@subdivi.de>  Tue, 15 Dec 2020 15:37:19 +0100
+
 pilercr (1.06+dfsg-3) unstable; urgency=medium
 
   * Team upload.
diff --minimal -Nru pilercr-1.06+dfsg/debian/rules 
pilercr-1.06+dfsg/debian/rules
--- pilercr-1.06+dfsg/debian/rules      2020-12-05 11:52:04.000000000 +0100
+++ pilercr-1.06+dfsg/debian/rules      2020-12-15 15:37:19.000000000 +0100
@@ -1,5 +1,6 @@
 #!/usr/bin/make -f
 
+include /usr/share/dpkg/architecture.mk
 include /usr/share/dpkg/pkg-info.mk
 
 export DEB_BUILD_MAINT_OPTIONS = hardening=+all
@@ -7,13 +8,17 @@
 %:
        dh $@
 
-override_dh_installman:
+override_dh_auto_build:
+       dpkg-architecture -f -a$(DEB_BUILD_ARCH) -c dh_auto_build -- 
'GPP=$$(CXX)'
        help2man ./pilercr \
            --name 'software for finding CRISPR repeats' \
            --help-option '-options' --no-discard-stderr \
             --version-string ${DEB_VERSION_UPSTREAM} \
            --no-info > pilercr.1
-       dh_installman
+ifneq ($(DEB_BUILD_ARCH),$(DEB_HOST_ARCH))
+       $(RM) pilercr *.o
+       dh_auto_build -- 'GPP=$$(CXX)'
+endif
 
 override_dh_auto_clean:
        rm -f *.o pilercr pilercr.1

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