Makefile: only set some BASIC_CFLAGS when RUNTIME_PREFIX is set

Several build variables only have any meaning when the RUNTIME_PREFIX
variable has been set. In particular, the following build variables are
otherwise ignored:

    HAVE_BSD_KERN_PROC_SYSCTL
    PROCFS_EXECUTABLE_PATH
    HAVE_NS_GET_EXECUTABLE_PATH
    HAVE_ZOS_GET_EXECUTABLE_PATH
    HAVE_WPGMPTR

Make setting BASIC_CFLAGS, for each of these variables, conditional on
the RUNTIME_PREFIX being defined.

Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: ramsay-jones

Makefile

@@ -2179,10 +2179,6 @@ ifdef HAVE_BSD_SYSCTL
 	BASIC_CFLAGS += -DHAVE_BSD_SYSCTL
 endif
 
-ifdef HAVE_BSD_KERN_PROC_SYSCTL
-	BASIC_CFLAGS += -DHAVE_BSD_KERN_PROC_SYSCTL
-endif
-
 ifdef HAVE_GETDELIM
 	BASIC_CFLAGS += -DHAVE_GETDELIM
 endif
@@ -2213,25 +2209,33 @@ ifneq ($(findstring openssl,$(CSPRNG_METHOD)),)
 	EXTLIBS += -lcrypto -lssl
 endif
 
-ifneq ($(PROCFS_EXECUTABLE_PATH),)
-	procfs_executable_path_SQ = $(subst ','\'',$(PROCFS_EXECUTABLE_PATH))
-	BASIC_CFLAGS += '-DPROCFS_EXECUTABLE_PATH="$(procfs_executable_path_SQ)"'
-endif
-
 ifndef HAVE_PLATFORM_PROCINFO
 	COMPAT_OBJS += compat/stub/procinfo.o
 endif
 
-ifdef HAVE_NS_GET_EXECUTABLE_PATH
-	BASIC_CFLAGS += -DHAVE_NS_GET_EXECUTABLE_PATH
-endif
+ifdef RUNTIME_PREFIX
 
-ifdef HAVE_ZOS_GET_EXECUTABLE_PATH
-        BASIC_CFLAGS += -DHAVE_ZOS_GET_EXECUTABLE_PATH
-endif
+        ifdef HAVE_BSD_KERN_PROC_SYSCTL
+		BASIC_CFLAGS += -DHAVE_BSD_KERN_PROC_SYSCTL
+        endif
+
+        ifneq ($(PROCFS_EXECUTABLE_PATH),)
+		pep_SQ = $(subst ','\'',$(PROCFS_EXECUTABLE_PATH))
+		BASIC_CFLAGS += '-DPROCFS_EXECUTABLE_PATH="$(pep_SQ)"'
+        endif
+
+        ifdef HAVE_NS_GET_EXECUTABLE_PATH
+		BASIC_CFLAGS += -DHAVE_NS_GET_EXECUTABLE_PATH
+        endif
+
+        ifdef HAVE_ZOS_GET_EXECUTABLE_PATH
+		BASIC_CFLAGS += -DHAVE_ZOS_GET_EXECUTABLE_PATH
+        endif
+
+        ifdef HAVE_WPGMPTR
+		BASIC_CFLAGS += -DHAVE_WPGMPTR
+        endif
 
-ifdef HAVE_WPGMPTR
-	BASIC_CFLAGS += -DHAVE_WPGMPTR
 endif
 
 ifdef FILENO_IS_A_MACRO