Commit more stack size in some windows binaries

This way we can commit the same amount of stack size (64 MB) without a conditional.
Includes nix, libnixexpr-tests, libnixfetchers-tests, libnixstore-tests, libnixutil-tests.

tests/unit/libexpr/local.mk

@@ -38,3 +38,8 @@ libexpr-tests_LIBS = \
     libexpr libexprc libfetchers libstore libstorec libutil libutilc
 
 libexpr-tests_LDFLAGS := -lrapidcheck $(GTEST_LIBS) -lgmock
+
+ifdef HOST_WINDOWS
+  # Increase the default reserved stack size to 65 MB so Nix doesn't run out of space
+  libexpr-tests_LDFLAGS += -Wl,--stack,$(shell echo $$((65 * 1024 * 1024)))
+endif

tests/unit/libfetchers/local.mk

@@ -30,3 +30,8 @@ libfetchers-tests_LIBS = \
     libfetchers libstore libutil
 
 libfetchers-tests_LDFLAGS := -lrapidcheck $(GTEST_LIBS)
+
+ifdef HOST_WINDOWS
+  # Increase the default reserved stack size to 65 MB so Nix doesn't run out of space
+  libfetchers-tests_LDFLAGS += -Wl,--stack,$(shell echo $$((65 * 1024 * 1024)))
+endif

tests/unit/libstore/local.mk

@@ -31,3 +31,8 @@ libstore-tests_LIBS = \
     libstore libstorec libutil libutilc
 
 libstore-tests_LDFLAGS := -lrapidcheck $(GTEST_LIBS)
+
+ifdef HOST_WINDOWS
+  # Increase the default reserved stack size to 65 MB so Nix doesn't run out of space
+  libstore-tests_LDFLAGS += -Wl,--stack,$(shell echo $$((65 * 1024 * 1024)))
+endif

tests/unit/libutil/local.mk

@@ -27,6 +27,11 @@ libutil-tests_LIBS = libutil-test-support libutil libutilc
 
 libutil-tests_LDFLAGS := -lrapidcheck $(GTEST_LIBS)
 
+ifdef HOST_WINDOWS
+  # Increase the default reserved stack size to 65 MB so Nix doesn't run out of space
+  libutil-tests_LDFLAGS += -Wl,--stack,$(shell echo $$((65 * 1024 * 1024)))
+endif
+
 check: $(d)/data/git/check-data.sh.test
 
 $(eval $(call run-test,$(d)/data/git/check-data.sh))