Search for libgfortran.so and put it in deps/usr/lib

deps/build.jl

@@ -12,11 +12,11 @@ libgsl = library_dependency("libgsl", aliases=["libgsl-0"])
 #provides(Pacman, "gsl", libgsl)
 
 if is_apple()
-    if Pkg.installed("Homebrew") === nothing
-        error("Homebrew package not installed, please run Pkg.add(\"Homebrew\")")
-    end
-    using Homebrew
-    provides(Homebrew.HB, "homebrew/versions/gsl1", libgsl, os = :Darwin)
+  if Pkg.installed("Homebrew") === nothing
+    error("Homebrew package not installed, please run Pkg.add(\"Homebrew\")")
+  end
+  using Homebrew
+  provides(Homebrew.HB, "homebrew/versions/gsl1", libgsl, os = :Darwin)
 end
 
 # build from source
@@ -25,6 +25,34 @@ provides(BuildProcess, Autotools(libtarget = "libgsl.la"), libgsl)
 
 @BinDeps.install Dict(:libgsl => :libgsl)
 
+# gfortran search
+here = dirname(@__FILE__)
+
+@static if is_linux()
+  found_libgfortran = false
+  if Libdl.find_library("libgfortran") == ""
+    locations = ["/usr/local/lib", "/usr/lib"]
+    try
+      gfortran_version = chomp(readstring(`gfortran -dumpversion`))[1:3]
+      push!(locations, "/usr/lib/gcc/x86_64-linux-gnu/$gfortran_version")
+    end
+    for d in locations
+      isdir(d) || continue
+      f = joinpath(d, "libgfortran.so")
+      if isfile(f)
+        run(`ln -s $f $(joinpath(here, "usr", "lib"))`)
+        found_libgfortran = true
+        break
+      end
+    end
+  else
+    found_libgfortran = true
+  end
+  if !found_libgfortran
+    error("libgfortran.so not found. Did you install it?")
+  end
+end
+
 ## BinDeps end
 
 function validate_libcutest()
@@ -52,7 +80,6 @@ function check_env()
   nothing
 end
 
-here = dirname(@__FILE__)
 cutestenv = joinpath(here, "cutestenv.jl")
 
 if validate_libcutest()