disable -flto=auto during link on OpenSUSE

kevinushey · kevinushey · commit 7ee23f20a719 · 2020-05-05T17:10:17.000Z
diff --git a/inst/NEWS b/inst/NEWS
@@ -1,5 +1,6 @@
 RcppParallel 5.0.1 (UNRELEASED)
 ------------------------------------------------------------------------
+* Fixed compilation issue on OpenSUSE Tumbleweed with -flto=auto
 * Fixed compilation when CPPFLAGS = -I/usr/local/include and a version
   of libtbb is installed there
 
diff --git a/src/Makevars.in b/src/Makevars.in
@@ -2,6 +2,8 @@
 PKG_CPPFLAGS = -I../inst/include
 PKG_CXXFLAGS = @CXX11STD@
 
+override LDFLAGS = @LDFLAGS@
+
 ifeq ($(OS), Windows_NT)
 
   USE_TBB=Windows
diff --git a/tools/config/configure.R b/tools/config/configure.R
@@ -75,6 +75,11 @@ if (Sys.info()[["sysname"]] == "Windows") {
 
 }
 
+# override LDFLAGS (disable LTO on OpenSUSE)
+ldflags <- read_r_config("LDFLAGS", envir = NULL)[[1]]
+ldflags <- gsub("-flto=auto", "", ldflags, fixed = TRUE)
+define(LDFLAGS = ldflags)
+
 # use c++0x for compatibility with older compilers
 define(STDVER = "c++0x")
 

Original file line number	Diff line number	Diff line change
`@@ -75,6 +75,11 @@ if (Sys.info()[["sysname"]] == "Windows") {`
`75`	`75`
`76`	`76`	`}`
`77`	`77`
	`78`	`+# override LDFLAGS (disable LTO on OpenSUSE)`
	`79`	`+ldflags <- read_r_config("LDFLAGS", envir = NULL)[[1]]`
	`80`	`+ldflags <- gsub("-flto=auto", "", ldflags, fixed = TRUE)`
	`81`	`+define(LDFLAGS = ldflags)`
	`82`	`+`
`78`	`83`	`# use c++0x for compatibility with older compilers`
`79`	`84`	`define(STDVER = "c++0x")`
`80`	`85`