[gnurl] 288/411: acinclude: detect manually set minimum macos/ipod version

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nikita pushed a commit to branch master
in repository gnurl.

commit c131148b695afd9cf6601ce8879711ccb8ba0a9d
Author: Daniel Stenberg <daniel@haxx.se>
AuthorDate: Thu Oct 29 10:01:42 2020 +0100

    acinclude: detect manually set minimum macos/ipod version
    
    ... even if set in the CC or IPHONEOS/MACOSX_DEPLOYMENT_TARGET
    variables.
    
    Reported-by: hamstergene on github
    Fixes #6138
    Closes #6140
---
 acinclude.m4 | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/acinclude.m4 b/acinclude.m4
index e7a36e4bd..fb77b2cfd 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -2526,14 +2526,20 @@ AC_DEFUN([CURL_MAC_CFLAGS], [
   AC_MSG_RESULT([$tst_cflags]);
 
   if test "$tst_cflags" = "yes"; then
-    AC_MSG_CHECKING([for *version-min in CFLAGS])
+    AC_MSG_CHECKING([for *version-min set by user])
     min=""
-    if test -z "$(echo $CFLAGS | grep m.*os.*-version-min)"; then
+    if test -n "$IPHONEOS_DEPLOYMENT_TARGET"; then
+      var="IPHONEOS_DEPLOYMENT_TARGET"
+    elif test -n "$MACOSX_DEPLOYMENT_TARGET"; then
+      var="MACOSX_DEPLOYMENT_TARGET"
+    elif test -z "$(echo $CFLAGS $CC | grep m.*os.*-version-min)"; then
       min="-mmacosx-version-min=10.8"
       CFLAGS="$CFLAGS $min"
+    else
+      var="CFLAGS or CC"
     fi
     if test -z "$min"; then
-      AC_MSG_RESULT([set by user])
+      AC_MSG_RESULT([set by user in $var])
     else
       AC_MSG_RESULT([$min set])
     fi

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