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Bug#1126018: r-base: Please exclude LDFLAGS from libR.pc

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Package: r-base
Version: 4.5.2-1
Severity: important
Tags: patch
X-Debbugs-Cc: bdrung@debian.org

Dear Maintainer,

When building the pkg-config file for libR in src/unix/Makefile.in, the
following stanza,

```
install-pc:
    @$(MKINSTALLDIRS) "$(DESTDIR)$(libdir)/pkgconfig"
    -@$(SED) -e "s:@rhome:$(rhome):" \
      -e "s:@rincludedir:$(rincludedir):" \
      -e "s:@rarch:$(R_ARCH):" \
      -e 's:@libsprivate:$(STATIC_LIBR_PC):' \
      -e 's:@others:$(MAIN_LDFLAGS) $(LDFLAGS):' \
      -e 's/@VERSION/$(VERSION)/' $(srcdir)/libR.pc.in \
      > "$(DESTDIR)$(libdir)/pkgconfig/libR.pc"
```

combines MAIN_LDFLAGS with LDFLAGS and sticks it into the "Libs" field
of the resulting libR.pc file. That's not what you want: LDFLAGS
contains the user's linker flags at this point, i.e. whatever they have
in their environment variable.

On Ubuntu we started setting --package-metadata and ran into
https://launchpad.net/bugs/2138363. The --package-metadata flag must not
leak into the pkg-config file.

We applied the attached patch to the Ubuntu package to exclude LDFLAGS
from libR.pc. I forwarded the patches upstream and attached the patch
here.

-- 
Benjamin Drung
Debian & Ubuntu Developer

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Bug#1126018: r-base: Please exclude LDFLAGS from libR.pc Benjamin Drung <bdrung@debian.org> - 2026-01-20 14:20 +0100
  Bug#1126018: r-base: Please exclude LDFLAGS from libR.pc Dirk Eddelbuettel <edd@debian.org> - 2026-01-20 14:40 +0100

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