[PROJ] 9.7.0 asks for a warning that is unknown on gcc 7

[Greg Troxel]

I got a message that pkgsrc CI showed that proj 9.7.0 failed on NetBSD 9
i386.  I was expecting an i386 issue (vs x86_64), but it was a warning
that is not known by gcc7.

  g++: error: unrecognized command line option '-Wdeprecated-copy-dtor'; did you mean '-Wduplicated-cond'?

  https://releng.netbsd.org/pkgreports/shadow/HEAD/NetBSD-9.0-i386/20250922.1125/proj-9.7.0/build.log


I can't figure out which version of gcc has this.  But proj builds on
NetBSD 10, which has gcc 10.


This patch works around it in pkgsrc, obviously not suitable for proj itself.

--- CMakeLists.txt.orig	2025-09-23 22:12:59.828352847 +0000
+++ CMakeLists.txt
@@ -72,7 +72,6 @@ if("${CMAKE_C_COMPILER_ID}" STREQUAL "GN
     # -Wold-style-cast
     -Woverloaded-virtual
     -Wzero-as-null-pointer-constant
-    -Wdeprecated-copy-dtor
   )
 elseif("${CMAKE_C_COMPILER_ID}" MATCHES "Clang")
   set(PROJ_common_WARN_FLAGS ${PROJ_common_WARN_FLAGS}



With that, tests passed except for "builtins" which says

Reading file '/tmp/work/geography/proj/work/proj-9.7.0/test/gie/builtins.gie'
     -----
     FAILURE in builtins.gie(5005):
     expected: 9742698.935838246718 4443057.188599349000
     got:      9742704.587892338634   4443057.289049109444
     deviation:  5652.946631 mm,  expected:  1.000000 mm
     -----
     FAILURE in builtins.gie(5021):
     expected: 10363494.047136424109 -4443057.188599349000
     got:      10363499.699190337211   -4443057.088148688897
     deviation:  5652.946468 mm,  expected:  1.000000 mm


and I realize that's not super helpful and I'll see about other
gcc/cpu/etc.

Yes, I just barely realize I should update to 9.7.1, which came out
during our quarterly freeze.