fix macos build

weird: after replacing the UNAME line with an identical one,
it does work properly now(??).
Possibly a case of hidden special character?

.github/workflows/dev-long-tests.yml

@@ -31,12 +31,12 @@ jobs:
       run: make test
 
   # lasts ~26mn
-  make-test-osx:
+  make-test-macos:
     runs-on: macos-latest
     steps:
     - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # tag=v4.1.1
-    - name: OS-X test
-      run: make test # make -c lib all doesn't work because of the fact that it's not a tty
+    - name: make test on macos
+      run: make test
 
   # lasts ~24mn
   make-test-32bit:

lib/Makefile

@@ -298,14 +298,6 @@ PCLIBPREFIX := $(if $(findstring $(LIBDIR),$(PCLIBDIR)),,$${exec_prefix})
 PCEXEC_PREFIX := $(if $(HAS_EXPLICIT_EXEC_PREFIX),$(EXEC_PREFIX),$${prefix})
 
 
-ifneq ($(MT),)
-  PCLIB :=
-  PCMTLIB := $(LDFLAGS_DYNLIB)
-else
-  PCLIB := $(LDFLAGS_DYNLIB)
-endif
-
-
 ifneq ($(MT),)
   PCLIB :=
   PCMTLIB := $(LDFLAGS_DYNLIB)